The Pacman Nebula (Prabhakaran)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1590 · LBN 615 · LBN 616 · NGC 281 · Sh2-184

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The Pacman Nebula

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The Pacman Nebula

The Pacman Nebula.

NGC 281, IC 11 or Sh2-184 is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way's Perseus Spiral Arm.
High-mass stars are important because they are responsible for much of the energy pumped into our galaxy over its lifetime. Unfortunately, these stars are poorly understood because they are often found relatively far away and can be obscured by gas and dust. The star cluster NGC 281 is an exception to this rule. It is located about 9,200 light-years from Earth and, remarkably, almost 1,000 light-years above the plane of the Galaxy, giving astronomers a nearly unfettered view of the star formation within it.
NGC 281 is known informally as the "Pacman Nebula" because of its appearance in optical images. In optical images, the "mouth" of the Pacman character appears dark because of obscuration by dust and gas.
Capture Details:
Dates: December 13, 2021 with 73 % gibbous Moon
S - 1 minute x 62
H - 1 minute x 62,
O- 1 minute x 62,
Overall integration time: 3.1 hours Flats, darks, bias
SHO palette
Sensor temp: -10° @120 gain 2x2 binning
Equipment: GSO 8" RC - TSCCD67 reducer - ZWO 294MM Pro Camera - Antlia 3nm SHO filters, 7 Position 36mm filter wheel - AZEQ6 Mount (ZWO OAG with ZWO224MC cam for guiding)
Processing software: Pixinsight - Stacking, SHO Combination, DBE, MSLT, HT, pixel math, CC, CurvesT, SCNR, Deconvolution, LHE, MorphologicalT.

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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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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	...
PixInsight job	UWWCSUL4COD9B5RV8QVH132U6W4OCKNG
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h52m48s.178
RA (top/left)	00h55m10s.316
RA (top/right)	00h55m05s.728
RA (bottom/right)	00h50m22s.749
RA (bottom/left)	00h50m34s.122

Dec (center)	+56°38′38″.37
Dec (top/left)	+56°11′15″.58
Dec (top/right)	+57°06′34″.50
Dec (bottom/right)	+57°05′48″.95
Dec (bottom/left)	+56°10′31″.96

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