Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  The star 9 Cas
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CTB1 - The Garlic Nebula, AstroDarks
CTB1 - The Garlic Nebula
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Getting plate-solving status, please wait...
CTB1 - The Garlic Nebula, AstroDarks
CTB1 - The Garlic Nebula
Powered byPixInsight

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Description

Presenting a project continued from last year. CTB1 or Abell 85, the Garlic Pop Nebula!

CTB 1 is a supernova remnant in the Cassiopeia constellation. It was originally cataloged by George Abell as a planetary nebula. Later discoveries revealed that CTB 1 is actually a very faint supernova remnant, about the size of the full moon. It's approximately 10,000 light-years from Earth and is approximately 100 light years in diameter.

The hydrogen-alpha shell is extremely faint, and was just barely visible in a 5-minute sub-exposure from a mono camera. Being in Bortle 7 didn't help either. Revealing the full circular shape was definitely going to be a challenge, so I spent a few nights on this object for a total exposure time of 60 hours (Including 10 hrs of OSC narrowband data from last year).

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CTB1 - The Garlic Nebula, AstroDarks