Dolphin Head Nebula (Michelle Bennett)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 CMa) · 16 omi01 CMa · HD50492 · HD50563 · HD50591 · HD50646 · HD50679 · HD50680 · HD50740 · HD50781 · HD50804 · HD50896 · HD51013 · HD51034 · HD51036 · HD51087 · HD51155 · HD51176 · HD51407 · LBN 1052 · Sh2-308 · The star Udra (ο1 CMa

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Dolphin Head Nebula

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Dolphin Head Nebula

The Dolphin Head Nebula (SH2-308 ) is 5000 light years from us with a diameter of 60 light years.
The star near the centre of the nebula is a Wolf-Rayet star in a pre-supernova phase and has created the bubble. The central star has completely lost its outer hydrogen and is burning helium. The bubble is material from an earlier stage of the star's evolution.

Image is from my telescope and astrocam in the back yard, Bortle 2.

This was acquired with narrowband and RGB filters and my first attempt adding in RGB stars.

Original
B
Final
C

The refractors!
Australian Astrophotographers
Southern Hemisphere Astro
Narrowband imaging
Nebula Photos Monthly Challenge
ZWO ASI2600MM Pro

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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
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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
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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	6038479
PixInsight job	DKRTMEGPQGRQ34UGTJ7YUV1WY3D1DKSZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h54m19s.864
RA (top/left)	06h51m31s.785
RA (top/right)	06h53m21s.779
RA (bottom/right)	06h57m08s.897
RA (bottom/left)	06h55m17s.260

Dec (center)	-23°51′03″.68
Dec (top/left)	-23°28′48″.52
Dec (top/right)	-24°33′30″.50
Dec (bottom/right)	-24°13′06″.67
Dec (bottom/left)	-23°08′38″.00

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Dolphin Head Nebula

Dolphin Head Nebula

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Dolphin Head Nebula

Dolphin Head Nebula

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