Hoag's Object - PGC54559

Ring Galaxy in Serpens

Uploaded 5/8/05

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 This amazing object belongs to one of the rarest galaxy classes in the entire sky, Ring Galaxies. Exceedingly dim at 15.0 magnitude, it is very small a 1 arcminute in size and has been the studied with the great Hubble Space Telescope in some detail. First thought to be a planetary nebula, Art Hoag in the 50's later determined by its spectrum that it was a very distant distorted galaxy created by the passage of another galaxy through the core of a probably normal spiral. You can still see today the yellowish inner core, and outer bluish remains of the arms.

If you look at the larger images, you can just make out the highly fragmented nature of the blue ring, as in my image here appearing as gaps on the right side. I strongly recommend you spend the time with the largest image and also see the large number of background galaxies in this image!

In this crop of the central region of the frame, you can see a pair of dim 16th magnitude spirals off to the left.

Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: LRGB = 60:20:20:20 (RGB Binned 2x2) RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 7 arcsec (Maxim DL - 10min subframe), Transparency 8/10 Outside Temperature: 5 C CCD Temperature: -20 C Processing Tools: Maxim DL, Photoshop, PixInsight, RW Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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