NGC7635, SH2-157, NGC7538 & NGC7654 (Steven Hill)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 1 Cas · 2 Cas · 4 Cas · Bubble Nebula · HD218067 · HD218439 · HD218440 · HD219286 · HD219287 · HD219634 · HD219854 · HD219978 · HD220016 · HD220056 · HD220057 · HD220074 · HD220102 · HD220130 · HD220147 · HD220167 · HD220180 · HD220369 · HD220760 · HD220770 · HD220819 · HD221037 · HD221038 · HD221143 · HD240248 · HD240250 · And 41 more.

NGC7635, SH2-157, NGC7538 & NGC7654

NGC7635 - AKA Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot, central star' The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. It was discovered in November 1787 by William Herschel.

SH2-157 - AKA Lobster Claw Nebula. Sharpless 157, also known as the Lobster Claw Nebula, is a bright emission nebula in the constellation Cassiopeia. It lies just south of the better-known Bubble Nebula (NGC 7635).

NGC7538 - AKA Northern Lagoon Nebula. NGC 7538 is an emission and reflection nebula near the Cassiopeia - Cepheus border. It is home to the largest known protostar. The Herschel Space Observatory has also identified 13 massive, dense clumps where colossal stars could form in the future, as well as a strange ring of stellar seeds which may be the edge of a bubble carved by previous stellar explosions. NGC 7538 is about 9000 light-years away from Earth.

NGC7654 - AKA M52, the Scorpion Cluster, is an open cluster of stars in the northern constellation of Cassiopeia. It was discovered by Charles Messier in 1774.

Please note: The following tables are updated every 24 hours.

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
Artificial satellite

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.

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Status	Advanced success
Started	...
PixInsight job	70HUQCSUCA7A850ARTF53CMN5HAK84LZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h18m10s.36
RA (top/left)	23h24m04s.100
RA (top/right)	23h35m11s.20
RA (bottom/right)	23h11m15s.90
RA (bottom/left)	23h02m49s.53

Dec (center)	+61°09′03″.0
Dec (top/left)	+58°43′09″.6
Dec (top/right)	+62°43′18″.10
Dec (bottom/right)	+63°33′55″.6
Dec (bottom/left)	+59°27′38″.8

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NGC7635, SH2-157, NGC7538 & NGC7654

NGC7635, SH2-157, NGC7538 & NGC7654

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NGC7635, SH2-157, NGC7538 & NGC7654

NGC7635, SH2-157, NGC7538 & NGC7654

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