Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  The star 9Cas
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CTB-1 Pomegranate Super Nova Remnant in Ha, Douglas J Struble
CTB-1 Pomegranate Super Nova Remnant in Ha
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CTB-1 Pomegranate Super Nova Remnant in Ha

Getting plate-solving status, please wait...
CTB-1 Pomegranate Super Nova Remnant in Ha, Douglas J Struble
CTB-1 Pomegranate Super Nova Remnant in Ha
Powered byPixInsight

CTB-1 Pomegranate Super Nova Remnant in Ha

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Description

Finished off my Ha data on CTB-1, a work in progress. I had to really massage the data, as it is very faint. On to OIII.

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. It was identified as a SNR by van den Bergh et al. in 1972 based upon its optical half-circular shape consisting of radiative filaments. Deeper images taken in H-alpha by Fesen (1993) show that it has a complete circular shape except for the unusual breakout structure toward the northeast, which also shows up in X-Ray images. Distance and age estimates are 10,000 light years, and 7,500 – 11,000 years, respectively. It spans nearly 100 light years.

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CTB-1 Pomegranate Super Nova Remnant in Ha, Douglas J Struble