Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  9 Cas  ·  LBN 576  ·  The star 9Cas
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CTb 1 in HOO, Carlos Uriarte
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CTb 1 in HOO

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CTb 1 in HOO, Carlos Uriarte
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CTb 1 in HOO

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Description

A supernova remmant, 57 h exp time in HOO palette. It's size in the sky is similar to the size of a full moon. It's outer shell has ruptured between the 10 and 11 o'clock position. Originally this was thought to be a Planetary nebula (Abell 85) but in 1971 it was determined that is actually a supernova remmant.

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CTb 1 in HOO, Carlos Uriarte

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Takahashi Refractors