Lion Nebula (Darius Kopriva)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD211564 · HD211643 · HD211820 · HD211853 · HD211982 · HD212183 · HD212312 · HD235807 · HD235810 · HD239919 · HD239928 · HD239929 · HD239933 · LBN 471 · LBN 473 · LDN 1154 · LDN 1156 · LDN 1161 · LDN 1163 · Sh2-132

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Lion Nebula

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Lion Nebula

Sh2-132 is a large emission nebula visible in the constellation Cepheus.

It is located on the southern edge of the constellation, a short distance from the boundary with the Lizard, along the plane of the Milky Way; the best period for its observation in the evening sky falls between the months of July and December and is greatly facilitated for observers located in the northern hemisphere regions of Earth.

Sh2-132 is located at a distance of nearly 3200 parsecs (almost 10400 light-years), thus placing it within the Perseus Arm, in the region of Cepheus OB1, a large and bright OB association. The stars responsible for the ionization of its gas are very hot and massive; in particular, two Wolf-Rayet stars have been identified, known as HD 211564 and HD 211853 (the latter also having the abbreviation WR 153), as well as a spectral class O8.5V star and about ten B-class stars. Around the O-class star and one of the Wolf-Rayet stars extends a bubble clearly visible in the radio wave band, identified as Shell B, probably originating from the stellar wind of the two massive stars. A similar but smaller structure, Shell A, hosts a K-class star near its center. Chain star formation processes are believed to have taken place in the nebula in the past; currently these processes appear to be suspended, since there is no evidence of recent activity. Nine sources of infrared radiation and a maser with H2O emissions have been detected in the direction of the nebula.

Southern Hemisphere Astro

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	Distinct awarded users	Total awarded images
Image of the day
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	7008920
PixInsight job	HNIBE970B0SVGM7CR8IEEPTRO2AHUB14
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h19m29s.15
RA (top/left)	22h16m30s.59
RA (top/right)	22h16m34s.83
RA (bottom/right)	22h22m22s.14
RA (bottom/left)	22h22m29s.21

Dec (center)	+56°05′16″.9
Dec (top/left)	+56°42′04″.0
Dec (top/right)	+55°28′21″.8
Dec (bottom/right)	+55°28′14″.2
Dec (bottom/left)	+56°41′56″.0

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Lion Nebula

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