Sh2-200 (Michel Makhlouta)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD19243 · LBN 674 · PGC 138608 · PGC 168324 · PGC 168326 · PGC 2797337 · PGC 2797345 · PGC 2797346 · PGC 2797350 · PGC 2797361 · PGC 2797375 · PGC 2797376 · PK138+04.1 · Sh2-200

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Sh2-200

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Sh2-200

Sh2-200, also known as HDW 2, is an ancient planetary nebula in Cassiopeia. Despite being very old and highly evolved, low surface brightness planetary nebulae such as HDW 2 contain very hot and energetic central stars, which are the remnant cores of the progenitor star that died and ejected its outer gaseous layers. The energy output of some planetary nebula central stars is so prodigious that it is capable of ionizing unrelated gas in the surrounding vicinity causing it to glow. (Description excerpted from Sakib Rasool's)

I have collected data on this image over the past two to three months, while winter hasn't been kind with clear skies. I couldn't get a lot of information about this target, and I would appreciate any references anyone might have access to.

Comments and feedback are always appreciated.

Merry Christmas everyone, clear skies, and happy new year!

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	6847544
PixInsight job	BOPYQYRJOSFTA5AZLJSV5ABAWFGZWKTK
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	03h11m00s.13
RA (top/left)	03h14m25s.47
RA (top/right)	03h14m39s.54
RA (bottom/right)	03h07m26s.63
RA (bottom/left)	03h07m29s.64

Dec (center)	+62°47′45″.10
Dec (top/left)	+62°11′40″.6
Dec (top/right)	+63°23′04″.1
Dec (bottom/right)	+63°23′25″.0
Dec (bottom/left)	+62°12′06″.3

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Sh2-200

Sh2-200

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Image Index:

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Sh2-200

Sh2-200

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Description

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