Sh 2-173 "Phantom of the Opera" (Federico Lorenzo Barra)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 12 Cas · HD1010 · HD1166 · HD1239 · HD1383 · HD1400 · HD1544 · HD1613 · HD1697 · HD1743 · HD1810 · HD1843 · HD1917 · HD236377 · HD2451 · HD2535 · LBN 592 · LBN 593 · LDN 1282 · LDN 1283 · NGC 103 · Sh2-173 · The star 12 Cas

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Sh 2-173 "Phantom of the Opera"

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Sh 2-173 "Phantom of the Opera"

SH 2-173, known as the "Phantom of the Opera" nebula, is a lesser-known but visually striking astronomical object, part of the Sharpless catalog of HII regions. This catalog, compiled by astronomer Stewart Sharpless in the mid-20th century, includes nebulae predominantly found in the Northern Hemisphere. SH 2-173, a relatively obscure object in amateur astronomy, derives its evocative nickname from its ghostly appearance and complex structure, reminiscent of the theatrical mask from the famous play.Located in the constellation Cassiopeia, SH 2-173 is a diffuse nebula characterized by a cloud of ionized gas emitting light of various colors, depending on the chemical composition and degree of ionization. The nebula is an active site of star formation, with young, hot stars within it ionizing the surrounding gas. This results in the nebula's characteristic glow, a feature common to HII regions. The intricate patterns and shapes within the nebula, illuminated by these stars, create a dramatic visual effect, which, when captured in long-exposure astrophotographs, reveals a complex interplay of light and shadow.

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.
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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	9059846
PixInsight job	31TB8O6XH8XWFGJA4YN4GJYDKLNT3DS0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h23m11s.83
RA (top/left)	00h29m07s.55
RA (top/right)	00h14m17s.70
RA (bottom/right)	00h17m39s.30
RA (bottom/left)	00h31m43s.27

Dec (center)	+61°40′16″.8
Dec (top/left)	+62°41′55″.8
Dec (top/right)	+62°20′05″.8
Dec (bottom/right)	+60°37′43″.2
Dec (bottom/left)	+60°58′18″.9

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Sh 2-173 "Phantom of the Opera"

Sh 2-173 "Phantom of the Opera"

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Sh 2-173 "Phantom of the Opera"

Sh 2-173 "Phantom of the Opera"

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