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Contains:  NGC 4565, NGC 4562
Getting plate-solving status, please wait...

NGC 4565 - A Colorful Needle

Technical card

Resolution: 3343x2949

Dates:April 23, 2018April 25, 2018April 27, 2018April 28, 2018

Astrodon B Tru-Balance E-Series Gen 2: 11x1200" -25C bin 1x1
Astrodon G Tru-Balance E-Series Gen 2: 14x1200" -25C bin 1x1
Astrodon L Gen.2 E-series: 14x1200" -35C bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 22x1200" -25C bin 1x1

Integration: 20.3 hours

Darks: ~13

Flats: ~13

Bias: ~20

Avg. Moon age: 10.91 days

Avg. Moon phase: 81.18%

Mean SQM: 21.80

Mean FWHM: 2.00

Temperature: 14.00 job: 2066909

RA center: 189.077 degrees

DEC center: 25.977 degrees

Pixel scale: 0.477 arcsec/pixel

Orientation: 180.813 degrees

Field radius: 0.295 degrees

Locations: Deep Sky West, Rowe, NM, United States

Data source: Unknown


NGC 4565 is an edge on galaxy that's thought to be a barred spiral. Visually is a 10th magnitude object at a distance of 30-50 mly located in the constellation of Coma Berenices. Its size makes it a great target for amateur equipment so it's a very commonly imaged galaxy.

It seems like a long dry spell. After the sudden death of my last PC, I've struggled for about 6 weeks with an emergency home-brew computer running my system while I worked to get a more permanent solution in place. As I struggled through crashes, hangs, glitches, and a million other issues, I picked the famous Needle to test the system while I got it going. Since I hadn't imaged this galaxy before, it became a full blown project. Unfortunately, coupled with all of my computer problems we had a spate of unusually crummy weather in northern New Mexico. I just couldn't get a break and finally, as the weather began to clear and steady nights returned, I was faced with only a few hours to gather data each night before the Needle disappeared behind the high, western wall of the observatory. I had some weird problems with transient "dust" motes and stray light from a star outside the FOV that I had to hand correct so this isn't the cleanest image that I've ever produced. The Needle is getting too low to try to take more data so I'll have to try again next year to get some cleaner data to add to this set. Anyway, I finally go it done!

As always, C&C is welcome so fire a way. Hopefully, it's not too ragged...

Best regards,



John Hayes
License: None (All rights reserved)



Lowered blue saturation a bit


Slightly raised black level

Sky plot

Sky plot


NGC 4565 - A Colorful Needle, 


            John Hayes

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