Dolphin Head Nebula (SH2-308) in narrowband (HOO palette) (Jon Gascoyne)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 CMa) · 16 omi01 CMa · HD50047 · HD50154 · HD50232 · HD50304 · HD50535 · HD50646 · HD50680 · HD50711 · HD50740 · HD50781 · HD50804 · HD50852 · HD50853 · HD50896 · HD50914 · HD50939 · HD51013 · HD51036 · HD51086 · HD51088 · HD51229 · HD51283 · HD51285 · HD51341 · HD51408 · HD51456 · HD51457 · HD51516 · And 17 more.

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Dolphin Head Nebula (SH2-308) in narrowband (HOO palette)

Powered byPixInsight

Dolphin Head Nebula (SH2-308) in narrowband (HOO palette)

The Dolphin Head Nebula (catalogued as Sh2-308, Sharpless 308, RCW 11, or LBN 1052) is an H II region located near the center of the constellation Canis Major about 4,530 light years from Earth. The ionisation of oxygen within the nebula gives it its strong blue/green colouration.

The nebula is bubble-like and surrounds a Wolf–Rayet star named EZ Canis Majoris. This star is in the brief, pre-supernova phase of its stellar evolution.

Data acquired by Skygems Observatories using AFIL-9, Remote Skygems Observatories - Hakos, Namibia
Available from the Starbase website https://starbase.insightobservatory.com/inventory

Acquisition (18/12/2022 - 01/02/2023)
46 x 300 sec Ha (bin x1) mapped to RED channel
35 x 300 sec OIII (bin x1) mapped to GREEN & BLUE channels

Total integration: 6 hrs 45 min

Reflection/Dark Nebulae

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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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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.

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	...
Astrometry.net job	9095696
PixInsight job	X2TF2WCQ556Q37CKGQSVDH7LUSFJFRVA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h54m32s.55
RA (top/left)	06h50m38s.72
RA (top/right)	06h50m24s.81
RA (bottom/right)	06h58m31s.81
RA (bottom/left)	06h58m34s.97

Dec (center)	-23°48′00″.1
Dec (top/left)	-22°24′49″.1
Dec (top/right)	-25°09′56″.8
Dec (bottom/right)	-25°11′05″.10
Dec (bottom/left)	-22°25′35″.6

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Dolphin Head Nebula (SH2-308) in narrowband (HOO palette)

Dolphin Head Nebula (SH2-308) in narrowband (HOO palette)

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Image Index:

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Dolphin Head Nebula (SH2-308) in narrowband (HOO palette)

Dolphin Head Nebula (SH2-308) in narrowband (HOO palette)

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