Dolphin Head Nebula - Sh2-308 (James Hawks)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 omi01 CMa · LBN 1047 · LBN 1052 · Sh2-308 · The star ο1CMa

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Dolphin Head Nebula - Sh2-308

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Dolphin Head Nebula - Sh2-308

Dolphin Head Nebula - Sh2-308, ~4530 light years away, is an H II region located near the center of the constellation Canis Major. It is composed of ionized hydrogen. The nebula is bubble-like and surrounds a star named EZ Canis Majoris. This star is in the brief, pre-supernova phase of its stellar evolution.

Acquisition:
   Location: Queen Creek, AZ Bortle 7
   Date: 2021-12-(05, 11, 12)
   Lights (Dithered, Cooled 0°C, Gain 100):
       244 x 180s
   Darks: 25
   Flats: 25
   Dark Flats: 25

Hardware:
   Camera: ZWO ASI 2600MC PRO
   Scope: Celestron EdgeHD 11"
   Focal Reducer: Hyperstar v4
   Focuser: Feather Touch with Starizona Focus Motor
   Guide Camera: Unguided
   Guide Scope: Unguided
   Mount: GM2000 HPS II
   Filter: Optolong L-Extreme

Software:
   SGP
   APP
   Pixinsight
   Photoshop

Processing:
   Stacked in APP
   Pixinsight (DCrop, DBE, PhotometricCC, EZDenoise, EZSoftStretch, StarXterminator)
   Gradient removal using AstroFlat Pro
   Astronomy Tools Actions Photoshop
   Camera Raw Filter in Photoshop
   StarShrink
   Color/Levels Adjustments

N.I.N.A. Users

Please note: The following tables are updated every 24 hours.

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
Top pick nominations

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
Northern lights
Noctilucent clouds
Landscape

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	5341559
PixInsight job	8TEMMDBDHJEHRI47UPG98XFT3U0F2S4X
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h54m25s.41
RA (top/left)	06h51m13s.51
RA (top/right)	06h51m43s.60
RA (bottom/right)	06h57m40s.20
RA (bottom/left)	06h57m04s.40

Dec (center)	-23°53′52″.5
Dec (top/left)	-22°43′54″.4
Dec (top/right)	-25°07′48″.9
Dec (bottom/right)	-25°03′37″.9
Dec (bottom/left)	-22°39′50″.8

Image Index:

Contribution Index (beta):

Dolphin Head Nebula - Sh2-308

Dolphin Head Nebula - Sh2-308

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Contribution Index (beta):

Dolphin Head Nebula - Sh2-308

Dolphin Head Nebula - Sh2-308

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Description

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