Wide‑Field Astrophotography of Orion: Horsehead, Flame, and Orion Nebula in RGB + Hα

 Two clear Sundays in a row ...

Orion is one of the most popular constellations for astrophotography. With showpiece objects like the Orion Nebula and the Horsehead Nebula, you can’t go wrong pointing your telescope there on the few clear winter nights we get. Sunday, March 1st was forecast to be clear, so I slewed my telescope to the central spine of the Orion Molecular Cloud Complex — framing the Horsehead/Flame region and the Orion Nebula (M42/M43), with the Belt stars Alnitak and Alnilam anchoring the field.

The Moon was nearly full that night, so I used my Optolong L‑eXtreme filter to tame the bright sky. The following Sunday, March 8th, was also clear, but this time the Moon didn’t rise until after midnight. That gave me a chance to capture the field in broadband RGB with no filter. The final image is a composite of the RGB data from March 8th and the Hα extracted from the dual‑narrowband data from March 1st.

Image 1: RGB + Ha image of the central spine of the Orion molecular Cloud Complex

RGB + Ha image of the central spine of the Orion Molecular Cloud Complex captured from my backyard on 3/1/2026 & 3/8/2026.

What is it?

This field captures the central spine of the Orion Molecular Cloud Complex, one of the richest and most active star‑forming regions in the night sky. The combination of bright emission nebulae, dark dust clouds, reflection nebulae, and massive blue stars makes this area a favorite for both astrophotographers and professional astronomers.

Image 2: Annotated image

An annotated version of the image.

Prominent Objects in the Field

Horsehead Nebula (B33) - The Horsehead Nebula, also known as Barnard 33, is a dark nebula silhouetted against the red glow of the emission nebula IC 434. Its dense dust cloud blocks the background light, creating the distinctive horse‑head shape that makes it one of the most recognizable objects in the night sky.

Flame Nebula (NGC 2024) - The Flame Nebula is an emission nebula next to the leftmost star in Orion’s Belt, Alnitak. Dark dust lanes cut through the bright emission region, and smaller branches of dust radiate outward, enhancing its resemblance to a flickering flame.

Orion Nebula (M42) & De Mairan's Nebula (M43) - M42 is arguably the most popular target for amateur astronomers (both visual and astrophotography).  This area is a bright H II region and an active stellar nursery. M42 is a massive star forming region and is (astronomically speaking) relatively close to the Earth. M43 is just north of M42. M42 and M43 are separated by a dark dust lane.

Running Man Nebula (Sh 2‑279) – The Running Man is a combination of emission and reflection nebulae located just north of M42 and M43. Bright blue starlight reflects off surrounding dust while faint H II emission fills the background, creating the distinctive “running” silhouette that gives the nebula its name. 

Alnitak and Alnilam - Alnitak is the leftmost star and Alnilam is the middle star in Orion's belt. Both stars are bright Type O/B stars. 

How big is it?

For reference, the Moon has an apparent size of 31 arcminutes.

Horsehead Nebula (B33) - The Horsehead Nebula has an apparent size of 6 x 4 arcminutes on the sky with an actual diameter of 2.8 light-years (ly). 

Flame Nebula (NGC 2024) - The Flame Nebula has an apparent size of 30 x 30 arcminutes on the sky with an actual diameter of 7.1 ly.

Orion Nebula (M42) & De Mairan's Nebula (M43) - M42 has an apparent size of 85 x 65 arcminutes on the sky with an actual diameter of 34.7 ly. M43 has an apparent size of 20 x 15 arcminutes on the sky with an actual diameter of 10.2 ly.

Running Man Nebula (Sh 2-279) - The Running Man Nebula has an apparent size of 40 x 25 arcminutes on the sky with an actual diameter of about 15 ly.

How far is it?

Distance estimates for the Nebulae in this image range from 1,260 to 1,600 ly from Earth.

Alnitak is about 740 ly and Alnilam is about 2,000 ly from Earth.

How to find it?

Refer to the red rectangle in the finder chart below. 

Let's start with the easiest objects to find, Alnitak and Alnilam. Alnitak is the leftmost star and Alnilam is the middle star in Orion's Belt. Both Stars are visible with just your eyes, and can be seen from just about anywhere.

Just below Orion's belt are three stars (maybe 2 depending on light pollution and sky conditions) known as His Sword. M42 is the middle "star" in the sword. Visible to the naked eye (light pollution and sky conditions depending) as a fuzzy star. Easily observed in binoculars and telescopes. 

The Horsehead is "easy" to find but very difficult to actually see (visually). Think of trying to see a black smudge on a black tablecloth. Although it is difficult to visually observe, it is relatively easy to image. To visually observe the Horsehead Nebula, a 10" or larger telescope, H-beta filter, and dark skies are required. The Horsehead is located about 1 degree south of the bright star Alnitak (the leftmost star in Orion's belt). 

Image 3: Finder Chart

Finder chart for the field.

Processing:

My goal with this image was to preserve natural star colors from the RGB data while using Hα to enhance the emission structures in IC 434, the Flame Nebula, and the extended nebulosity around M42. The workflow below reflects that balance.

Narrowband Workflow:

Linear Processing: 

• Gradient removed with MSG. 

• The narrowband image was aligned to the RGB image with Star Alignment. 

• The registered image was cropped using Dynamic Crop and the instance of the process was saved to the desktop so it could be used to duplicate the crop on the RGB image. 

• BlurXTerminator was used for deconvolution

• The stars were removed with StarXTerminator. (The narrowband stars were not saved)

• Noise was reduced with NoiseXTerminator. 

• The image was made non-linear with Generalized Hyperbolic Stretch. 

Non-linear processing: 

• The image was separated into the R, G, & B channels using Channel Extraction. 

• The R image was used as the Ha image and the B & G (Oiii) images were discarded.

RGB Workflow:

Linear Processing: 

• Gradient was removed with MSG. 

• The image was cropped to duplicate the narrowband images with the saved instance of Dynamic Crop.

• BlurXTerminator was performed in correct only mode. 

• Color calibration was performed with SPCC.

• BlurXterminator was used for deconvolution.

• The stars were removed (and saved) with StarXTerminator.

Starless linear processing:

• The image was made non-linear with Generalized Hyperbolic Stretch.

Starless non-linear processing: 

• The toolbox CombineHawithRGB script was used to blend the Ha into the RGB image.

• I used the CreateHDRImage script to tone down the core of the Orion Nebula.

• Image blend was used for sharpening by using the high pass filter. 

• CT was used to enhance color and color saturation.

Star Processing:

• Stars were stretched with Seti Astro's Star Stretch script.

• CT was used to enhance color and saturation.

Final Blend

• The stars were screened back into the starless image with PixelMath. 

Image Details:

Narrowband Image:

Capture Date: 03/01/2025

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: Optolong L-eXtreme

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 45 exposures @ 180 sec each for a total exposure of 2 hours and 15 minutes. All exposures were captured at Gain 100 / Offset 50 / -20°C each.

Software: NINA, SharpCap Pro, PHD2, and PixInsight

RGB Image:

Capture Date: 03/08/2025

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: N/A

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 108 exposures @ 60 sec each for a total exposure of 1 hour and 48 minutes. All exposures were captured at Gain 100 / Offset 50 / -10°C each.

Software: NINA, SharpCap Pro, PHD2, and PixInsight

Total Integration Time: 4 hours and 3 minutes

Clear Skies!

Ernie

Under March Skies: The Seagull Nebula Spreads Its Wings

 A Seagull in Space

On the night of March 9, 2026, I imaged the Seagull Nebula (IC 2177 / Gum 2 / Sh2‑296), a large H II emission and reflection nebula complex located along the Monoceros–Canis Major boundary. This wide‑field frame was captured from Eden, New York, and encompasses approximately a 7.5° × 3.5° field of view, including the nebular structure of IC 2177 as well as several associated open clusters, most notably Messier 50 (NGC 2323). The Seagull Nebula is part of the larger Canis Major R1 star‑forming region and is well suited to wide‑field, narrowband imaging due to its extensive hydrogen emission and low surface brightness.

The Seagull Nebula (IC 2177 / Gum 2 / Sh2-296) captured with my wide-field astrophotography rig from my backyard on 3/9/2026.

What is it? How big is it? How far away is it? 

This annotated wide‑field frame centers on the Seagull Nebula (IC 2177 / Gum 2 / Sh2‑296), a large H II / reflection complex captured from my backyard on 3/9/2026, with several open clusters (notably M50 / NGC 2323) and smaller NGC clusters visible across the ~7.5° × 3.5° field.

An annotated image highlighting notable objects found within the field of view.

Seagull Nebula — IC 2177 (Gum 2 / Sh2‑296)

Type: H II emission + reflection nebula complex. Key fact: the region forms the “head and wings” that give the Seagull its name; ionized hydrogen and reflection from dust produce the bright structure in wide‑field images. Context: IC 2177 straddles the border of Monoceros and Canis Major and is part of a larger star‑forming complex (CMa R1).

M50 — Messier 50 / NGC 2323

Type: Bright open cluster (Messier object). Key facts: apparent magnitude ~5.9, distance ≈ 2,800–3,000 light‑years, and a compact, visually striking cluster often called the “Heart‑Shaped Cluster.” In your frame M50 provides a dense stellar contrast to the diffuse nebula.

NGC 2335

Type: Open cluster in the Seagull region. Key facts: moderately faint (visual mag ~7–7.8) and small on the sky (a few arcminutes across); it sits close to the nebular clouds and is often included in wide‑field mosaics of IC 2177. Use it as a positional anchor when identifying the eastern wing.

NGC 2343

Type: Open cluster. Key facts: visual mag ~6.7, angular size ~7–8′; appears as a compact grouping of stars embedded against the nebular background and helps mark the central portion of the Seagull complex in wide‑field views.

NGC 2353

Type: Young open cluster on the eastern edge of the CMa OB1/Seagull region. Key facts: visual mag ~7.1 and angular size ~15–20′; it is a loose but noticeable cluster that often appears in wide‑field images of this area and contributes to the “stellar scaffolding” around the nebula.

NGC 2318

Type: Smaller open cluster (fainter and more compact than M50). Key facts: angular size a few arcminutes; one of several lesser clusters in the field that, together with the larger NGC objects and M50, illustrate the region’s clustered star formation and line‑of‑sight richness.

How to find it?

The Seagull Nebula is located in the constellation Monoceros but is close to the border of the constellation Canis Major. Monoceros lacks bright stars, making traditional star-hopping difficult in this region. The object is located 7.5 degrees north of Sirius, the brightest star in the night sky. Dark skies, a wide field telescope, and nebula filter will help to see this object visually. The area is rich with deep-sky objects, including several open clusters such as M46, M47, and M50, either within the field or nearby.

A finder chart for the Seagull Nebula

Imaging Notes:

Monday, March 9th, was the second clear night in a row, with my wide‑field astrophotography rig still set up from the previous evening. Sunday’s imaging session will be covered in a separate post. Although we had just set the clocks ahead for Daylight Saving Time, it still became dark early enough to allow for a reasonable imaging session. My goal was to collect a couple of hours of data and be finished between 11:00 PM and midnight.

I selected the Seagull Nebula as my target for the night. As an emission nebula with extensive hydrogen structure, it is well suited to narrowband imaging, so I used a dual narrowband filter (Optolong L‑eXtreme). This filter isolates two 7 nm band passes centered on Ha and O iii, effectively suppressing broadband light pollution. The Moon rose after my imaging session and did not interfere with data collection. With uncertain weather ahead and limited clear nights this winter, I chose to capture this target while conditions allowed. The Seagull Nebula has been on my imaging list for some time, but persistent poor weather over the past few winters had delayed the opportunity.

Processing:

The following outlines my complete PixInsight workflow, from calibration through final integration.

Pre-Processing: 

• All subs were visually inspected with Blink and subs with issues were removed. 
• All light Frames, Flats, Darks and Dark flats were loaded into WBPP.

 Linear Post Processing: 

• Background extraction was performed with GraXpert 
• BXT (correct only)
• SPCC was used for Color Calibration 
• Full application of BXT
• Noise was reduced with NXT
• The image was made non-linear with MAS

Non-linear Post Processing: 

• The Stars were removed using StarXT

Starless: 

• Narrowband normalization process in mode 1 was used to get the "SHO look"
• Color, intensity, and contrast were adjusted with various applications of CT
• Saturation was increased with CT
• The Image blend Script was used to sharpen the image with a High Pass Filter

Stars: 

• Saturation was increased with CT
• SCNR was applied 
• The Correct Magenta Stars Script was used to help with stars captured with a dual narrowband filter

Final: 

• The Stars and Starless images were combined with Pixel Math to produce the final image 
• CT was used to adjust contrast one last time

Image Details:

Capture Date: 03/09/2026

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: Optolong L-eXtreme

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 22 exposures @ 300 sec each for a total exposure of 1 hour and 50 minutes. All exposures were captured at Gain 100 / Offset 50 / -10°C each.

Software: NINA, SharpCap Pro, PHD2, and PixInsight

Clear Skies!

Ernie

The California Nebula: A Cosmic Tapestry of Birth, Death, and Distance

 California dreaming on a beautiful Autumn Night ...

NGC 1499, The California Nebula captured from my backyard on 10/3/2025

What is it? (Written with AI assistance)

An annotated version of the image of NGC 1499

When you first look at the California Nebula (NGC 1499), it’s easy to see why it earned its name. Stretching across the constellation Perseus, its glowing hydrogen clouds trace an outline reminiscent of the U.S. state of California. But beyond its striking resemblance, this nebula tells a much deeper story—one that spans the entire cycle of stars and reaches far beyond our galaxy.

A Star Ignites a Nebula

At the heart of this glowing cloud lies Xi Persei (Menkib), a massive O-type star. Its fierce ultraviolet radiation ionizes the surrounding hydrogen gas, causing the nebula to shine in vivid reds and pinks. In my HOO color mapping, hydrogen dominates in red, while faint traces of oxygen shimmer in blue (maybe a hint of teal). This interplay of light reveals the raw energy of a star powerful enough to sculpt an entire nebula.

A Catalog of Cosmic Neighbors

The California Nebula is also known as Sharpless 2-220, part of a catalog dedicated to hydrogen-rich regions. But what makes this field truly fascinating is the company it keeps. Scattered across the same frame are dozens of faint galaxies, each labeled with IC (Index Catalogue) designations. Unfortunately, most aren't visible in the wide-field image captured with a dual-narrowband filter. These galaxies, such as IC 2000–2007, IC 2027 and IC 1994–1999, are not part of the nebula at all—they lie far beyond, their light traveling hundreds of millions of years to reach us. in my image, IC 2005 is actually behind the nebula and IC 2027 appears as a tiny star like point. 

And then there’s a surprise: IC 2003, a planetary nebula. Unlike the sprawling California Nebula, this is the remnant of a dying star, a shell of gas cast off as the star’s core contracts. To capture both a stellar nursery and a stellar grave in the same field is a rare and poetic juxtaposition.

A Cosmic Juxtaposition

This single image contains three layers of the universe’s story:

• Stellar Birth: The California Nebula, where new stars are forming.
• Stellar Death: IC 2003, a planetary nebula marking the end of a star’s life.
• Galactic Distance: The faint IC galaxies, silent witnesses from far beyond the Milky Way.

Together, they remind us that the night sky is not a flat canvas but a vast, three-dimensional tapestry. What looks like a single scene is actually a layered story of creation, transformation, and unimaginable distance.

Why It Matters

For me, this is what astrophotography is all about—not just capturing light, but capturing meaning. A single frame can hold the birth of stars, the death of stars, and the light of galaxies so distant they make our own Milky Way feel small. The California Nebula is more than a pretty picture—it’s a reminder that the universe is always telling stories, if we take the time to listen.

How big is it?

NGC 1499 has an angular distance of 145.0 x 45.0 arcminutes (1 degree is 60 arcminutes) on the night sky. For reference, the Sun and the Moon have an angular distance of 31 arcminutes on the sky. It is about 74.3 light-years (ly) long.

How far is it?

NGC 1499 is located about 1,800 light-years (ly) from Earth in the Constellation Perseus.

How to find it?

NGC is faint but can be observed visually. due to it's large size, an instrument with a wide field of view is best. Dark skies and an Nebula filter (especially H-Beta) are very helpful. Refer to the finder chart below. The Red Rectangle indicates the field of view for the image.

Finder Chart for NGC 1499

Imaging Notes:

Friday October 3rd was forecast to be clear all night. After getting home from work, I set up my wide-field imaging rig. Since the Moon was nearly full (full Moon was on 10/6), an emission nebula (NGC 1499) was selected as the target and a dual-narrowband filter was used to fight against the light from the Moon. 

Since NGC 1499 didn't clear the trees until after 12:30 AM, I collected some narrowband data on M31 with the hopes being able to get Ha to add to my M31 image. The first sub rolled in at 12:45 AM. The skies were pretty good. Transparency and seeing were above average. I went to sleep around 1:30 AM. The rig kept collecting subs until 6:07 AM. A total of 92 good sub exposures were collected.

Processing:

All pre and post processing was performed in PixInsight. Pre-Processing: All subs were visually inspected with Blink and subs with issues were removed. All light Frames, Flats, Darks and Dark flats were loaded into WBPP. Linear Post Processing: Background extraction was performed with DBE followed by BXT (correct only). SPCC was used for Color Calibration followed by a full application of BXT. The Stars were removed using StarXT. Starless Linear: Noise was reduced with NXT. The image was made non-linear with HT. Linear Stars: The stars were made non-linear with Seti Astro's Star Stretch Script.

Non-linear Post Processing: Starless: The Narrowband Normalization process was used in in mode 2 to get the "HOO look". Color, intensity, and contrast were adjusted with various applications of CT. Saturation was increased with CT. The Image blend Script was used to sharpen the image with a High Pass Filter. LHE was applied at 2 Kernel sizes and Unsharp mask was applied. CT was used to increase contrast. Stars: Saturation was increased with CT. SCNR was applied and the Correct Magenta Stars Script was used to help with stars captured with a dual narrowband filter. CT was used to adjust contrast one last time. Final: The Stars and Starless images were combined with Pixel Math to produce the final image. 

Image Details:

Capture Date: 10/03/2025

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: Optolong L-eXtreme

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 92 exposures @ 180 sec each for a total exposure of 4 hours and 36 minutes. All exposures were captured at Gain 100 / Offset 50 / -10°C each. 

Other: ZWO EAF, Pegasus Astro Powerbox Advance

Software: NINA, PHD2, Pegasus Astro Unity, SharpCap (Polar Alignment), & PixInsight

Clear Skies!

Ernie

The Great Nebula in Andromeda

 The Great What in Andromeda???!!!

It is hard to believe that it has only been a little over 100 years since humanity has known that the "Spiral Nebulae" we were observing were other galaxies outside of our home galaxy, the Milky Way. The key piece of evidence of this came when Edwin Hubble recognized that a star in Andromeda was a special kind of variable star, allowing him to estimate the enormous distance to it. It is one of the first objects other than the Moon or Planets that I observed through a telescope/binoculars. 

Here's an image of The Andromeda Galaxy(M31) captured from backyard on 9/19/2025 with my wide-field imaging rig:

M31 - The Andromeda Galaxy captured from my backyard on 9/19/2025.

What is it? (Written with AI assistance):

An Annotated version of the image.

M31

Andromeda Galaxy (M31, NGC 224) — A large, nearby spiral galaxy with a bright central bulge and extended spiral disk visible in deep images. Role: M31 is the nearest major galaxy to the Milky Way and the dominant member of the Local Group. Key properties: contains roughly a trillion stars, lies about 2.5 million light‑years away, and spans on the order of 150–200 thousand light‑years across. The image shows the luminous core, surrounding spiral structure, and dust lanes that trace the galaxy’s arms.

M32

Messier 32 — A compact dwarf elliptical satellite immediately adjacent to M31’s core. Appearance: small, high surface‑brightness object that appears round and concentrated. Significance: likely a tidally stripped remnant that has lost outer stars to M31, making it a useful tracer of interactions and the gravitational environment near Andromeda’s center.

M110

Messier 110 — A more diffuse dwarf elliptical satellite located near M31. Appearance: larger and fainter than M32 with an oval, low surface‑brightness profile. Notes: M110 shows evidence of mixed stellar populations and tidal disturbance from past encounters with M31.

NGC 206

NGC 206 — A bright star cloud or giant OB association located in one of M31’s spiral arms. Appearance: appears as a compact, luminous knot within the disk. Significance: one of the largest young star complexes in the Local Group, rich in massive, blue stars and open clusters.

Foreground Stars

53 v And and 32 And — Bright stars in the constellation Andromeda that lie in the foreground of the M31 field. 

Hubble’s Observations and the Recognition of Other Galaxies

Edwin Hubble identified Cepheid variable stars in M31 and used their pulsation periods to measure the galaxy’s distance. His measurements showed that M31 is far outside the Milky Way, proving that the “spiral nebulae” are separate galaxies. This discovery ended the debate about the scale of the universe, opened the field of extragalactic astronomy, and set the stage for later work on galaxy distances and cosmic expansion.

How big is it?

M31 has an angular distance of 189.1 x 61.7 arcminutes (1 degree is 60 arcminutes) on the night sky. For reference, the Sun and the Moon have an angular distance of 31 arcminutes on the sky. Andromeda is about 150,000 to 200,000 light-years (ly) in diameter.

How far is it?

M31 is located about 2.5 million light-years (ly) from Earth in the Constellation Andromeda.

How to find it?

M31 is relatively easy to find. From a dark site, with no bright Moon, it can be seen as fuzzy star with no optical aid. This s one of the most distant objects that can be seen with the unaided eye. This object can observed with Binoculars or a Telescope. A wide field of view is useful as M31 takes just over 3 degrees on the night sky (6 times the angular size of the Moon).

1. Find the Great Square of Pegasus
2. Find the corner star Alpheratz (technically it belongs to Andromeda not Pegasus).
3. Follow the bottom line of stars in andromeda until you get to Mirach.
4. Hop to uAnd (Mu Andromedae) on the top line in Andromeda.
5. Hop to vAnd (Nu Andromedae).
6. M 31 is just off of vAnd.

Finder Chart for M31.

Imaging Notes:

Friday September 19th was forecast to be clear all night. After getting home from work, I set up my wide-field imaging rig. Since the moon was heading towards New Moon (3% Waning Crescent), no filter was used and a broadband target was selected. Actually, I collected some more data on a project that I've been working since August. M31 was my second target, after the first target was lost to the trees. 

The first sub rolled in at 12:22 AM. The skies were ok. Transparency and seeing were average. I went to sleep around 1:30 AM. The rig kept collecting subs until 4:36 AM. A total of 111 good sub exposures were collected.

Processing:

All pre and post processing was performed in PixInsight. Pre-Processing: All subs were visually inspected with Blink and subs with issues were removed. All light Frames, Flats, Darks and Dark flats were loaded into WBPP. Linear Post Processing: Background extraction was performed with GraXpert followed by BXT (correct only). SPCC was used for Color Calibration followed by a full application of BXT. The Stars were removed using StarXT. Starless Linear: Noise was reduced with NXT. The image was made non-linear with HT. Linear Stars: The stars were made non-linear with Seti Astro's Star Stretch Script.

Non-linear Post Processing: Starless: The Create HDRImage script was used to recover detail in the core of the galaxy. Color, intensity, and contrast were adjusted with various applications of CT. Saturation was increased with CT. Sharpening was performed with the Image Blend Script. LHE was applied at 2 kernel sizes and Unsharp mask was applied. The DSE script was used to enhance dust lanes in the galaxies core. Stars: Saturation was increased with CT. Final: The Stars and Starless images were combined with Pixel Math to produce the final image. 

Image Details:

Capture Date: 9/19/2025

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: N/A

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 111 exposures at 120 sec / Gain 100 / Offset 50 / -10°C each for a total exposure of 3 hours and 42 minutes.

Software: NINA, SharpCap Pro, PHD2, and PixInsight

Clear Skies!

Ernie

The Heart and Soul Nebulae

 The Soul Nebula looks like a Stampeding Buffalo to me ...

Sorry, I haven't posted in a long time. There are several factors that collectively have contributed to this. However, the main issue is I have spent most of the month of August working on a project. A faint target that I'm trying to capture both broadband and narrowband data. I'm still collecting data on it, but now that we are in September, I'm unable to image this "Project Target" all night. This has allowed me to switch off to other targets once I lose the "Project Target" to the trees. 

Monday September 8th was one of those nights where I was able to image another target. On the 8th I captured this image of the Heart and Soul Nebulae (IC 1805 & IC 1848) with my wide-field imaging rig. 

The Heart (IC 1805) and the Soul (IC1848) Nebulae processed with a "SHO" look. I think the Soul looks like a stampeding buffalo when oriented like above. Living near Buffalo, NY, but I may be biased.

This image is from the same data but was processed to have a "HOO" look.

What is it? (Written with AI Assistance)

Annotated version of the image.

Heart Nebula (IC 1805)

• Type: Emission nebula and star-forming region
• Description: A vast H II region glowing in red hydrogen-alpha light, shaped roughly like a human heart. At its center lies the open cluster Melotte 15, whose hot, massive stars produce the intense ultraviolet radiation that ionizes the surrounding gas. Dark dust lanes thread through the nebula, creating striking contrast against the glowing emission.

Soul Nebula (IC 1848)

• Type: Emission nebula and star-forming region
• Description: Sometimes called the “Embryo Nebula” due to its rounded shape, the Soul Nebula is filled with young star clusters and active stellar nurseries. Its glowing hydrogen gas and dark dust pillars mirror the processes seen in the Heart, making the pair a classic astrophotography target. I see it as a North American Bison (Buffalo). Of course, I may be a tad biased as I live near Buffalo, NY.

Melotte 15

• Type: Open Star Cluster
• Description: This young star cluster is estimated to be about 1.5 million years old. Some of the stars that make up the cluster are 50 times the mass of the Sun. Many more are much smaller and fainter.

NGC 896

• Type: Bright emission nebula
• Description: The brightest knot of the Heart Nebula, often imaged separately. It was the first part of IC 1805 to be discovered and is rich in glowing hydrogen gas.

IC 1795

• Type: Emission nebula
• Description: A smaller star-forming region located between the Heart and Soul Nebulae, sometimes called the “Fish Head Nebula.” It is energized by young, massive stars and shows intricate filaments of gas and dust.

NGC 1027

• Type: Open star cluster
• Description: A loose grouping of stars near the Heart Nebula, providing a foreground contrast to the glowing gas clouds.

IC 289

• Type: Planetary nebula
• Description: A faint, small nebula formed from the outer layers of a dying star. Though much closer than the Heart and Soul Nebulae, it appears in the same wide field of view.

Notable Stars

• HD 15558 & HD 16691: Massive, luminous O-type stars within the Heart Nebula region. Their intense radiation and stellar winds shape the surrounding gas and drive ongoing star formation.

---

✨ Together, the Heart and Soul Nebulae form one of the Milky Way’s most iconic star-forming complexes, a cosmic “double portrait” of stellar birth sculpted in glowing hydrogen and dark dust.

How Big is it?

The Heart Nebula (IC 1805) has a size of 20 arcminutes (1 degree is 60 arcminutes) on the night sky and is about 44.5 light years in diameter.

The Soul Nebula (IC 1805) has a size of 60 x 30 arcminutes (1 degree is 60 arcminutes) on the night sky and is about 114 light years in diameter.

How Far is it?

The Heart Nebula (IC 1805) is located about 6,200 light-years (ly) in the Constellation Cassiopeia.

The Crescent (NGC 6888) is located about 6,500 light-years (ly) in the Constellation Cassiopeia.

How to Find it?

The Heart and Soul Nebulae are located in the Constellation Cassiopeia almost halfway between the stars Segin in Cassiopeia and Miram in Perseus as shown in the finder chart below. Both nebulae can be observed with wide-field setup (nebula filters will help). 

A finder chart for the Heart and Soul Nebulae.

Imaging Notes:

Monday September 8th was forecast to be clear all night. After getting home from work, I set up my wide-field imaging rig. Since there was a 99% Full Moon, I decided to shoot with my Optolong L-eXtreme dual narrowband filter. Once it was dark enough, I polar aligned, calibrated PHD2, and slew to the target so I could focus the imaging camera and set the imaging camera rotation. Then I took my flat frames and initiated the imaging sequence for the night.

The first sub rolled in at 10:35 PM. The skies were ok. Transparency was below average due to smoke, but the seeing was average to above average. I went to sleep around 11:30 PM. The rig kept collecting subs until 5:45 AM. A total of 130 good sub exposures were collected.

Processing:

All pre and post processing was performed in PixInsight. Pre-Processing: All subs were visually inspected with Blink and subs with issues were removed. All light Frames, Flats, Darks and Dark flats were loaded into WBPP. Linear Post Processing: Background extraction was performed with DBE followed by BXT (correct only). SPCC was used for Color Calibration followed by a full application of BXT. The Stars were removed using StarXT. Starless Linear: Noise was reduced with NXT. The image was made non-linear with HT. Linear Stars: The stars were made non-linear with Seti Astro's Star Stretch Script.

Non-linear Post Processing: Starless: Created a duplicate (clone) of the image. One version used the Narrowband normalization process in mode 1 was used to get the "SHO look" and the other used the same process to get the "HOO look" in mode 2. Color, intensity, and contrast were adjusted with various applications of CT. Saturation was increased with CT. The Image blend Script was used to sharpen the image with a High Pass Filter. LHE was applied at 2 Kernel sizes and Unsharp mask was applied. CT was used to increase contrast. Stars: Saturation was increased with CT. SCNR was applied and the Correct Magenta Stars Script was used to help with stars captured with a dual narrowband filter. CT was used to adjust contrast one last time. Final: The Stars and Starless images were combined with Pixel Math to produce the final image. 

Image Details:

Capture Date: 09/08/2025

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: Optolong L-eXtreme

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 130 exposures @ 180 sec each for a total exposure of 6 hours and 30 minutes. All exposures were captured at Gain 100 / Offset 50 / -10°C each.

Software: NINA, SharpCap Pro, PHD2, and PixInsight

Clear Skies!

Ernie

Exploring the Sadr Region: Backyard Astrophotography of Cygnus’ Celestial Wonders

 Lots of celestial goodness in this field ...

On 7/18/2025, I captured this image of the Sadr region in the constellation Cygnus with my wide-field imaging rig.

A wide-field image of the Sadr region in Cygnus captured from my backyard on 7/18/2025.

When processing Astro photos, it is common practice to separate the stars from the image. The stars and the object are then processed separately and recombined at the end. Here is the Starless image used to create the final image above.

A starless version of the image used in processing the data.

What is it? (This section written with AI assistance)

An annotated version of the image.

A few of the Celestial Objects in the image:

Gamma Cygni Nebula (IC 1318)

A sprawling emission complex centered on the bright star Sadr (Gamma Cygni). It spans over a degree of sky and consists of two main lobes of hydrogen-alpha emission, sometimes called the Butterfly Nebula. Dark dust lanes weave through the glow, tracing regions where cooler material absorbs background light. The Gamma Cygni Nebula belongs to the Cygnus X star-forming complex.

Crescent Nebula (NGC 6888)

Carved by the powerful stellar wind of the Wolf–Rayet star WR 136, this crescent-shaped bubble of ionized hydrogen glows vividly. The fast wind has excavated a hollow shell in the surrounding gas, creating sharp arcs and filamentary structures roughly 18 by 12 arcminutes in size.

Propeller Nebula (DWB 111/119)

Nicknamed for its propeller-like appearance, this faint emission and reflection nebula lies just south of the Crescent. Curved dust lanes and pockets of ionized gas form the “blades,” set against a rich Milky Way star field. Also known as Simeiz 57. The Propeller Nebula is also part of the Cygnus-X star forming complex.

Open Star Cluster M29

A compact grouping of about 50 bluish and white stars, M29 sits a few degrees east of Sadr. At roughly 4,000 light-years away and 10 million years old, its hot young stars form a loose “V” or “Y” pattern, contrasting with the surrounding nebular glow.

---

Notable Stars and Field Features

• Sadr (Gamma Cygni): Magnitude 2.2 supergiant at the center of IC 1318, the principal illuminating source.
• Field Stars: Hundreds of fainter Milky Way stars pepper the background, highlighting the vast scale of the nebular structures.

How Big is it?

The Gamma Cygni Nebula (IC 1318) has a size of 40 x 20 arcminutes (1 degree is 60 arcminutes) on the night sky and is about 17.5 light years across.

The Crescent Nebula (NGC 6888) has a size of 20.0 x 10. arcminutes (1 degree is 60 arcminutes) on the night sky and is about 31.6 light years across.

The Propeller Nebula (DWB 111/119) - I could not size information for this object.

M29 has a size of 10 arcminutes (1 degree is 60 arcminutes) on the night sky and is about 14.6 light years across.

How Far is it?

The Gamma Cygni Nebula (IC 1318) is located about 1,500 light-years (ly) in the Constellation Cygnus.

The Crescent Nebula (NGC 6888) is located about 5,400 light-years (ly) in the Constellation Cygnus.

The Propeller Nebula (DWB 111/119) is located about 4,600 light-years (ly) in the Constellation Cygnus.

M 29 is located about 5,000 light-years (ly) in the Constellation Cygnus.

How to Find it?

M29 can be observed visually. So can NGC 6888 (nebula filters and aperture will help). IC 1318 most likely can be observed visually; a wide field of view and nebula filter will help. The Propeller would be a very difficult visual observation. 

The field of view of the image is shown below. The Star Sadr (Gamma Cygni) is naked eye visible in the Constellation Cygnus.

A finder chart for the image.

Imaging Notes:

Friday July 18^th was forecast to be clear at night. I set up my wide-field imaging rig before dark. Once it was dark enough, I polar aligned, calibrated PHD2, and slew to the target so I could focus the imaging camera and set the imaging camera rotation. Then I took my flat frames and initiated the imaging sequence for the night.

The first sub rolled in at 10:28 PM. The skies were really good, especially early in the night. I went to sleep around 1 AM. The rig kept collecting subs until 4:30 AM. A total of 103 good sub exposures were collected; four frames were discarded prior to processing.

Processing:

All pre and post processing was performed in PixInsight. Pre-Processing: All subs were visually inspected with Blink and subs with issues were removed. All light Frames, Flats, Darks and Dark flats were loaded into WBPP. Linear Post Processing: Background extraction was performed with GraXpert followed by BXT (correct only). SPCC was used for Color Calibration followed by a full application of BXT. The Stars were removed using StarXT. Starless Linear: Noise was reduced with NXT. The image was made non-linear with HT. Linear Stars: The stars were made non-linear with Seti Astro's Star Stretch Script.

Non-linear Post Processing: Starless: The Narrowband normalization process was used to get the "SHO look". Color, intensity, and contrast were adjusted with various applications of CT. Saturation was increased with CT. The Image blend Script was used to sharpen the image with a High Pass Filter. LHE was applied at 2 Kernel sizes and Unsharp mask was applied. CT was used to increase contrast. Stars: Saturation was increased with CT. SCNR was applied and the Correct Magenta Stars Script was used to help with stars captured with a dual narrowband filter. CT was used to adjust contrast one last time. Final: The Stars and Starless images were combined with Pixel Math to produce the final image. 

Image Details:

Capture Date: 7/18/2025

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: Optolong L-eXtreme

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 103 exposures for a total exposure of 5 hours and 9 minutes. All exposures were captured at 180 sec / Gain 100 / Offset 50 / -10°C each.

Software: NINA, SharpCap Pro, PHD2, and PixInsight

Clear Skies!

Ernie

Wide-Field Cygnus Loop

 8,000 years ago, a star 20 times more massive than our Sun went KABOOM ...

If you said Kaboom in the voice of Marvin the Martian, then we think alike. Trying something new with this blog post. Going to change the order of the content. Let me know what you think. Note: An AI tool was used to help write the text in the "What is it?" section.

On 7/3/2025, I captured this image of the Cygnus Loop from my backyard with my wide-field imaging rig.

A wide-field image of the Cygnus Loop captured from my backyard on 7/3/2025.

When processing Astro photos, it is common practice to separate the stars from the image. The stars and the object are then processed separately and recombined at the end. Here is the Starless image used to create the final image above. 

A starless version of the image used in the processing of this data.

What is it?

An annotated image of the Cygnus Loop.

Western Veil Nebula (NGC 6960 “Witch’s Broom”)

Located at the western edge of the Cygnus Loop, NGC 6960 is a tangle of glowing filaments spanning over a degree of sky. Also called the Witch’s Broom, its curved arc traces shock waves from a supernova that exploded roughly 8,000 years ago, heating and ionizing the interstellar gas. Bright knots and wisps of hydrogen- and oxygen-rich material alternately glow in red and teal, against a field of faint Milky Way stars.

Eastern Veil Nebula (NGC 6992, NGC 6995 & IC 1340)

This section consists of two main filamentary loops—NGC 6992 to the north and NGC 6995 immediately south—plus fainter outlying strands cataloged as IC 1340. The sinuous, lace-like structures mark where fast-moving debris slams into surrounding gas at hundreds of kilometers per second. Vivid filament edges glow in narrowband emissions, revealing intricate curlicues of supernova-heated plasma.

Open Star Cluster NGC 6940

Situated just south of the Eastern Veil, NGC 6940 is a rich grouping of several dozen 8th–10th magnitude stars. At about 2,500 light-years distance, this intermediate-age cluster (≈1 billion years) provides a contrasting backdrop of yellow-white suns set against the nebular filaments. Its loosely bound stars form a gentle arc, adding depth to the wide-field composition.

Foreground and Field Stars

• 52 Cygni: A 4th-magnitude star superimposed on the Western Veil’s arc, lending the Witch’s Broom its bright “handle.”
• 49 Cygni & 48 Cygni: Pair of 5th-magnitude stars near the Eastern Veil, framing the nebular loops.
• Countless fainter Milky Way stars fill the background, emphasizing the vastness of the supernova remnant.

---

Together, these objects showcase the aftermath of stellar death alongside ongoing stellar life, framed by a tapestry of stars in the rich Cygnus Milky Way.

How Big is it?

The Cygnus Loop has a size of 3 degrees on the night sky and is about 120 light years across. For comparison, the Sun and the Moon have an angular distance of about 1/2 of a degree. 

The Western Veil Nebula (NGC 6960) has a size of 70 x 6 arcminutes (1 degree is 60 arcminutes) on the night sky and is about 53.1 light years across.

The Eastern Veil Nebula (NGC 6992) has a size of 60 x 30 arcminutes (1 degree is 60 arcminutes) on the night sky and is about 45.5 light years across.

NGC 6940 has a size of 25 arcminutes (1 degree is 60 arcminutes) on the night sky and is about 18.3 light years across.

How Far is it?

The entire Cygnus Loop (including Eastern & Western Veil Nebulae) is located about 2,400 light-years (ly) in the Constellation Cygnus.

NGC 6940 is located about 2,500 light-years (ly) in the Constellation Cygnus.

How to Find it?

This object can be visually observed. Dark skies are a must. A nebula filter, specifically an Oiii filter are almost required. This is a large object, so a wider field of view will let you see more of the object.

In the Finder Chart below. Find Cygnus the Swan, then locate Gienah (Epsilon Cygni) indicated by the letter "A" and Zeta Cygni indicated by the letter "B". Both stars will form an imaginary triangle with 52 Cygni, indicated by the letter "C". 52 Cygni is the bright star in the Western Veil. 

Finder Chart for the Cygnus Loop

Imaging Notes:

Thursday July 3^rd was forecast to be clear at night. I had a vacation day, extending the Independence Day holiday weekend. A clear night, no work the next day, no question I would be imaging. The 3^rd was one day past 1^st Quarter Moon, so a bright Moon would be up all night. Therefore, I decided to go after the Cygnus Loop with my wide-field setup and dual narrowband filter. I had to wait until nearly midnight for the object to clear the trees to begin the imaging sequence. The first sub came in at 11:46 PM. Subs continued to roll in until 4:14 AM as the skies started to brighten as dawn approached. Overall, an eventful evening. The skies were really good, and the equipment behaved. 

Processing:

All pre and post processing was performed in PixInsight. Pre-Processing: All subs were visually inspected with Blink and subs with issues were removed. All light Frames, Flats, Darks and Dark flats were loaded into WBPP. Linear Post Processing: Background extraction was performed with GraXpert followed by BXT (correct only). SPCC was used for Color Calibration followed by a full application of BXT. The Stars were removed using StarXT. Starless Linear: Noise was reduced with NXT. The image was made non-linear with HT. Linear Stars: The stars were made non-linear with Seti Astro's Star Stretch Script.

Non-linear Post Processing: Starless: Color, intensity, and contrast were adjusted with various applications of CT. Saturation was increased with CT. The Image blend Script was used to sharpen the image with a High Pass Filter. LHE was applied at 2 Kernel sizes and Unsharp mask was applied. CT was used to increase contrast. Stars: Saturation was increased with CT. SCNR was applied and the Correct Magenta Stars Script was used to help with stars captured with a dual narrowband filter. CT was used to adjust contrast one last time. Final: The Stars and Starless images were combined with Pixel Math to produce the final image. 

Image Details:

Capture Date: 7/3/2025

Location: Eden, NY

Telescope: Askar FMA180 Pro

Camera: ZWO ASI2600MC Pro

Filter: Optolong L-eXtreme

Mount: Sky-Watcher USA EQ6-R Pro

Exposure: 79 exposures for a total exposure of almost 3 hours and 57 minutes. All exposures were captured at 180 sec / Gain 100 / Offset 50 / -10°C each.

Software: NINA, SharpCap Pro, PHD2, and PixInsight

Clear Skies!

Ernie