Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  HD224055  ·  HD224403  ·  HD224669  ·  HD224892  ·  LBN 576
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CTB1 (Abell 85) in HOO, Eric Kallgren
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CTB1 (Abell 85) in HOO

Getting plate-solving status, please wait...
CTB1 (Abell 85) in HOO, Eric Kallgren
Powered byPixInsight

CTB1 (Abell 85) in HOO

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Description

CTB1 is a nearby supernova remnant (SNR) with an apparent diameter of about a half a degree (about the same size as a Full Moon). Upon early discovery, CTB1 was thought to be a planetary nebula, so Abell included it in his catalog of planetary nebulae as Abell 85. Further research showed that CTB1 is, in fact, a supernova remnant. The deep red color of the SNR comes from light emitted by energized Hydrogen (Ha), but CTB1 also has an area shining in blue/green light from energized Oxygen (OIII) atoms. The surrounding Ha light has been shown to be related to CTB1 as well.

CTB1 makes for a very challenging object to photograph, as it is quite faint.

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CTB1 (Abell 85) in HOO, Eric Kallgren

In these public groups

Cloudy Nights