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Abell 85

Classification: Abell 85, Supernova remnant (SNR) CTB 1 / LBN 576
Constellation: Cassiopeia (Cas)
Object Location: Ra 23h 58m 53s Dec +62° 30’28° (current)
Size & Distance: Apx. 35 x 35 Apx 9800 light years.

Date & Location: 08-19-2017 Palomar Mountain, CA.
Exposure: HaRGB 300-30-30-30, Ha 15x20, RGB 6x5 ea.(bin 1x1)
Optics: Telescope Engineering Company APO180FL @ f/5.23 using an Astro-Physics TCC160 F/L 941mm.
Mount: Astro-Physics 1200 GTOCP4 / ATS 10x36 Pier.
Camera: FLI-ML6303E @-25c / FLI CFW2-7 / FLI-Atlas focuser / Guided by SBIG ST-I / w OAG.
Filters: Astrodon 3nm Ha, G2 RGB
Software: MaxImDL 6.11, Photoshop CS5, Topaz Labs.

Notes: Sky conditions: Above average seeing, no wind, Temp 60°
Cropped Field of view is 88.6 x 64.5 arcmin.

Abell 85 supernova remnant is about 10,000 years old and is about 9800 light-years distant, and about 100 light-years in diameter.
Originally catalogued as Abell 85, a planetary nebula. It was soon determined to be a supernova remnant. It’s also recognized as a radio source and has a (CTB 1) designation.