A Galactic Needle ...
Thursday May 2nd was Tuesday for that week, the night our club's imaging group, The Tuesday Night Imagers, held our weekly session at the observatory. Stopped by the Observatory after work to help setup and troubleshoot an issue. We were getting intermittent camera download errors. We didn't resolve the error in this session, it took one more go to fully resolve the issue. however, we were able to collect data that night. Another member put her ZWO ASI533MC Pro on the club's Celestron 14" Edge HD (just like the M104 image from 4/15). I went home before dark but rejoined the group via Zoom around 9 PM (as it was getting dark enough to image). I signed off around 10:30 PM, imaging at the Observatory on work nights is tough as darkness fall so late. The following image is my process of the data.
 |
| NGC 4565, The Needle Galaxy from the BMO |
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. Noise was reduced with NXT. The image was made non-linear with HT. Non-linear Post Processing: Stars were removed with StarXT. Stars: Saturation was increased with CT. Starless: Saturation was increased with CT. LHE was applied at 3 Kernel sizes. Unsharp mask was applied and MMT was used to increase sharpness. The Stars and Starless images were combined with Pixel Math to produce the final image.
What is it?
NGC 4565 is also known as The Needle Galaxy. It is a prominent edge on Spiral Galaxy in the constellation of Coma Berenices. Scientists believe NGC 4565 resembles our own Milky Way Galaxy. Like M104, it has a prominent dust lane.
 |
| An annotated image of NG 4565, The Needle Galaxy |
How Big is it?
This object has an apparent size of 16.8 by 2.9 arcminutes (1 degree is 60 arcminutes) on the night sky. It is 191,800 light-years (ly) in diameter.
How Far is it?
It is located about 39 million light-years (ly) from Earth in the Constellation Coma Berenices.
How to find it?
This object is visible in small telescopes. A 8" telescope or larger is required to see the dust lane. Refer to the finding chart below.
 |
| Finder chart for NCG 4565, The Needle Galaxy |
