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Galaxies
IC 2574
Coddington's Nebula


Object : IIC 2574
Coordinates/Direction : RA: 10h28m, DEC: +68o24'
Object size : 12.02' x 5.5'
Apparent magnitude : 10.9
Distance : 12.8 Mly
No solar mass : 1e12
Type : SAB
Discovered by : Edwin Foster Coddington, year 1898
Find in constellation : Ursa Major
More to know : Wikipedia:
https://en.wikipedia.org/ wiki/ IC 2574

IC 2574, 2025-01-12

IC 2574 Galaxy, Eddington's nebula, 2025 (Click on image and get one in full resolution in a new window)
Date : 2025-01-12
Time (UT) : 18:07 to 18:57
Mount : SkyWatcher EQ6 Pro, Beltdrive (DIY 2019)
Guide : ASI120 camera with off-axis
Lens/telescope : Pentax 645 FA 300 mm ED f/4 (set to f/4)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5o (full frame) before crop
camera : Nikon D800, QE=0.56, full frame, 36 Mpixel, 14 bit
camera temperature: - , no temperature sensor
Film/CCD : Raw, NEF
Filter : none
Control system: Mount, camera, focus, guide (Ekos) controlled by KStars/Ekos Linux, 64-bit (2024)
Exp. time : 40x60 seconds at ISO400, with every 3rd dithered
Image process tool : Siril, Gimp, Irfanview
Processing :  flat, color metric calibration
Weather : clear sky, Moon phase 97%, temperature -4 degrees Celsius
Site : Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o
Comment : Galaxy IC 2574, once called Eddington's Nebula because he didn't understand it was a galaxy when he discovered it in 1898. A weak galaxy together with a full Moon make it barely visible. On the full resolution image the galaxies M81 and M82 can be seen at upper right corner, they are much brighter.
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