Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205
Getting plate-solving status, please wait...
M31 Andromeda Galaxy, 





    
        

            StarGale
M31 Andromeda Galaxy

M31 Andromeda Galaxy

Technical card

Resolution: 5085x3349

Dates:Aug. 26, 2014

Frames: 101x60" ISO1600

Integration: 1.7 hours

Darks: ~36

Flats: ~40

Bias: ~30

Avg. Moon age: 0.81 days

Avg. Moon phase: 0.73%

Temperature: 15.00

Astrometry.net job: 354782

RA center: 10.689 degrees

DEC center: 41.231 degrees

Pixel scale: 1.088 arcsec/pixel

Orientation: -92.304 degrees

Field radius: 0.920 degrees

Locations: Suburban backyard N/O Seattle, Lynnwood, WA, United States

Description

Another attempt to image M31 with more integration time. The stars are distorted, maybe a collimation problem. The stars appeared to be good when I took the first M31 shot, but I did not like the framing. I rotated the camera in the focuser but did not recheck focus. The subsequent shots were framed as I wanted but not as good of focus and/or collimation than the test shot.

I also have trouble getting the fainter edges of the galaxy to be brighter or stand out more. When I make the faint areas more visible I also introduce more noise over the entire image.

The temperature ranged from 58 to 61 degrees F while taking the light. I stacked the best 95 percent of 107 subexposures. The flats were taken at ISO 3200 which DSS warned me about.

The G11 mount was unguided with PEC turned off.

Comments

Author

StarGale
StarGale
License: None (All rights reserved)
2361
Like

Sky plot

Sky plot

Histogram

M31 Andromeda Galaxy, 





    
        

            StarGale