Sh2-190 (Kirby Collins)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD14218 · HD14320 · HD14328 · HD14345 · HD14346 · HD14441 · HD14442 · HD14510 · HD14519 · HD14552 · HD14558 · HD14579 · HD14617 · HD14632 · HD14644 · HD14695 · HD14696 · HD14749 · HD14794 · HD14795 · HD14817 · HD14914 · HD15022 · HD15069 · HD15102 · HD15238 · HD15239 · HD15250 · HD15344 · HD15382 · And 77 more.

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Sh2-190

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Sh2-190

Continuing nebula season, this image captures Sh2-190, aka the Heart Nebula. This nebula contains two active star forming regions identified by Gart Westerhout in his radio survey of the Milky Way. W3 is the bright, compact region at the lower right, while W4 is the core of the larger heart shaped region in the center of the image. W3 in particular is a complex region with several groups of young stars indicating multiple waves of star formation over the last 4 million years.

Article discussing Westerhout's catalog of radio sources:
http://galaxymap.org/drupal/node/32

Paper discussing structure and evolution of W3:
https://ui.adsabs.harvard.edu/abs/2015AJ....150...80R/abstract

Astro-Physics Mach1/Mach2
New Mexico Imagers

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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.

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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	8695750
PixInsight job	IQIHIXLZWW9J951PW38FW6FG1CM4DCI4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h32m38s.60
RA (top/left)	02h44m42s.23
RA (top/right)	02h45m47s.89
RA (bottom/right)	02h18m43s.59
RA (bottom/left)	02h21m16s.81

Dec (center)	+61°27′08″.8
Dec (top/left)	+59°12′12″.8
Dec (top/right)	+63°41′21″.5
Dec (bottom/right)	+63°37′40″.6
Dec (bottom/left)	+59°09′06″.5

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