Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble Nebula  ·  LBN 548  ·  LBN 549  ·  LDN 1231  ·  M 52  ·  NGC 7635  ·  NGC 7654  ·  PK112-00.1  ·  Sh2-162
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NGC 7635 & M 52 - Blubble Nebula and Open Cluster, Nicla.Camerin_Maurizio.Camerin
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NGC 7635 & M 52 - Blubble Nebula and Open Cluster

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NGC 7635 & M 52 - Blubble Nebula and Open Cluster, Nicla.Camerin_Maurizio.Camerin
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NGC 7635 & M 52 - Blubble Nebula and Open Cluster

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Description

"The Bubble Nebula is 7 light-years across – about one-and-a-half times the distance from our sun to its nearest stellar neighbor, Alpha Centauri – and resides 7,100 light-years from Earth in the constellation Cassiopeia.
The seething star forming this nebula is 45 times more massive than our sun. Gas on the star gets so hot that it escapes away into space as a "stellar wind" moving at over 4 million miles per hour. This outflow sweeps up the cold, interstellar gas in front of it, forming the outer edge of the bubble much like a snowplow piles up snow in front of it as it moves forward." https://hubblesite.org/contents/media/images/2016/13/3725-Image.htmlM52 is a magnitude +7.2 open cluster located in western Cassiopeia. This excellent grouping of stars is one of the best clusters in the northern Milky Way, with some 200 members spread across 13 arc minutes of apparent sky.
M52 was one of Charles Messier's original discoveries, which he cataloged on September 7, 1774. He spotted it when a comet he was observing passed close by. The cluster is easy to find since it's located one degree south of star, 4 Cas (mag. +5.0). https://freestarcharts.com/messier-52

It is the first time that we process this emission nebula as peculiar as it is beautiful. The data was acquired by Maurizio over a year and it is only in this last week of December and January that I have finished processing it.

The ionized hydrogen bed where it rests is very impressive, in fact reading about the NGC 7635 it is an HII region like the Christmas Tree Cluster.

I did the usual stack in both programs and the separate stack to obtain the star base. The stack was problematic with the Enhance sessions and I had to choose to make an exclusive stack with Extreme. However, the surprise was getting very little information of OIII. More integration time is probably needed.

To get more information on OIII I had to resort to the RGB blue channel (of the Enhance-Extreme stack) and join it with the OIII result from Siril, that helped to have a bit more structure, at least in the 'bubble' area.

Maurizio started doing Bubble sessions in this square including the Messier 52 open cluster to it and we liked to integrate in this image. Certainly its stars are not as colourful or of different colors compared to other open clusters, but I think they are worthy of being exposed like the rest of the celestial objects.

We appreciate your visit to see it and comments.

Processed Dec 2021- Jan 2022
https://twitter.com/AstroOtus/status/1477759024644956161

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