Click here for a higher resolution image of Abell 85 (882 Kb)

 

 

The Details
Object
Abell 85 in Cassiopeia
Optics
Astro-Physics 160 EDF refractor at f/5.7
Platform
Astro-Physics 1200 GTO
Camera
SBIG ST 10-XME
Filters
Tru-Balance 6nm Hydrogen Alpha filter
Date
25 and 27 October 2008
Location
Mount Wilson Observatory - Mount Wilson, CA
Exposure
Ha 18 x 1800 sec, 1x1 bin
Software
Maxim DL/CCD, Registar, Photoshop CS4
Orientation
Field of View: 54'07" x 36'27" centered on RA 23h59m19s
DEC+62°26'07" (2000.0) . North angle 359.16 °; east 90° CCW from north.
Notes

Abell 85, also known as CTB-1, is an extremely faint supernova remnant in the constellation Cassiopeia. This object is included in the Abell List of Planetary Nebulae, but is obviously cataloged incorrectly since the mechanism for its existence is a supernova explosion and not the late evolutionary step in the life of a near-solar mass star. Estimates of the distance to Abell 85 vary but average around 3 kpc. At that distance the diameter of this near-circular object would be about 100 light years, with an estimated age of about 100,000 years based on its measured expansion rate (Hailey and Craig, 1994). The apparent size of Abell 85 is about the same as the diameter of the full Moon

 

 

 

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