SH2- 308 "Dolphin Head Nebula" (Nebulosity_Media)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 CMa) · 16 omi01 CMa · HD49789 · HD49868 · HD49891 · HD50046 · HD50047 · HD50154 · HD50212 · HD50232 · HD50259 · HD50260 · HD50304 · HD50465 · HD50492 · HD50493 · HD50563 · HD50590 · HD50591 · HD50646 · HD50679 · HD50680 · HD50711 · HD50740 · HD50781 · HD50804 · HD50853 · HD50895 · HD50896 · HD51013 · And 31 more.

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SH2- 308 "Dolphin Head Nebula"

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SH2- 308 "Dolphin Head Nebula"

SH2-308, commonly known as the "Dolphin Head Nebula" is a HII region located in the constellation Canis Major. It is approximately 4300light years away. he massive star that created the bubble, a Wolf-Rayet star, is the bright one near the center of the nebula. Wolf-Rayet stars have over 20 times the mass of the Sun and are thought to be in a brief, pre-supernova phase of massive star evolution. Fast winds from this Wolf-Rayet star create the bubble-shaped nebula as they sweep up slower moving material from an earlier phase of evolution.

This image was captured with a ASI 2600MC Pro OSC camera and a TS-Optics 90mm CF APO f.6 Refractor (543mm focal length). I used a optolong L-eXtreme filter to capture the narrowband data.

This was my first time shooting 1000s exposures! I think it turned out pretty great, although I only have about 4.1hrs on the target.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
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Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
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Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
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	7169320
PixInsight job	E02CBHGSFKEH8N080R5DHAR26VOJXK75
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h54m15s.62
RA (top/left)	06h48m42s.53
RA (top/right)	06h59m36s.90
RA (bottom/right)	06h59m44s.62
RA (bottom/left)	06h48m59s.99

Dec (center)	-23°53′49″.7
Dec (top/left)	-24°38′50″.3
Dec (top/right)	-24°43′22″.1
Dec (bottom/right)	-23°08′04″.5
Dec (bottom/left)	-23°03′35″.5

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SH2- 308 "Dolphin Head Nebula"

SH2- 308 "Dolphin Head Nebula"

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SH2- 308 "Dolphin Head Nebula"

SH2- 308 "Dolphin Head Nebula"

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