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Coddington’s Nebula (IC 2574) Irregular Dwarf Galaxy in Ursa Major (95 hrs integration)

Contains: IC 2574

Technical card

Resolution: 1350x1400

Dates: July 10, 2016

Frames: 416x822"

Integration: 95.0 hours

Avg. Moon age: 5.54 days

Avg. Moon phase: 30.94%

Astrometry.net job: 1267517

RA center: 157.070 degrees

DEC center: 68.417 degrees

Pixel scale: 0.959 arcsec/pixel

Orientation: -179.446 degrees

Field radius: 0.259 degrees

Locations: The Hills Observatory, Manchester, United Kingdom

Description

Taken over a two year period on 34 nights. 6 filters used: R, G, B, NIR, Ha, & OIII
416 sub exposures from 6min to 1 hour long and a total integration time of 95 hours. There are too many different exposures and filters used to list in detail which is why I have just averaged the exposure time out amongst the number of sub exposures taken.

Not only is this faint dwarf galaxy recorded well with lots of nebulosity, but the whole image area is full of hundreds of fainter galaxies. Please take a look at the full size image and see how many you can find. (see image A for this)

This was taken as all my images are from Manchester UK, with lots of light pollution, so this was a real challenge. If I had dark skies, such a long integration time would not be needed.

I have added a cropped version for those who just want to view the galaxy.

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Author

Mike Oates
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Coddington’s Nebula (IC 2574) Irregular Dwarf Galaxy in Ursa Major (95 hrs integration), Mike Oates