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Contains:  NGC 4565, IC 3543, NGC 4562
Getting plate-solving status, please wait...

Caldwell 38, The Needle Galaxy

Technical card

Resolution: 4554x3424

Dates:April 7, 2018

Astrodon BLUE 31mm - Gen2 E-Series Tru-Balance: 33x120" (gain: 75.00) -15C bin 1x1
Astrodon GREEN 31mm - Gen2 E-Series Tru-Balance: 33x120" (gain: 75.00) -15C bin 1x1
Astrodon LUMINANCE 31mm - Gen2 E-Series Tru-Balance: 60x60" (gain: 75.00) -15C bin 1x1
Astrodon RED 31mm - Gen2 E-Series Tru-Balance: 33x120" (gain: 75.00) -15C bin 1x1

Integration: 4.3 hours

Avg. Moon age: 21.42 days

Avg. Moon phase: 57.69%

Bortle Dark-Sky Scale: 4.00 job: 2009595

RA center: 189.081 degrees

DEC center: 25.987 degrees

Pixel scale: 0.675 arcsec/pixel

Orientation: 273.009 degrees

Field radius: 0.534 degrees

Locations: Harrington Beach State Park, Belgium, Wisconsin, United States

Data source: Traveller


First all-nighter at my favorite local darker sky site of the season! Unseasonably cold, but the skies were very good for AP. New flat panel I made works great!

LRGB gain and offset 75/12, -15C for you ASI1600 users.



Chad Andrist
License: None (All rights reserved)



Fixed dark edge artifacts. They didn't jump out at me at first, but after a few hours away from the computer, I saw them. EDIT- I don't notice this on my XISF or TIFF files, so I wonder if it's the JPEG compression??


OK, tried a PNG file instead. Seems better. Perhaps I'm pixel-peeping too much. :-P

Sky plot

Sky plot


Caldwell 38, The Needle Galaxy, 


            Chad Andrist