The Dolphin Head Nebula, Sh2-308 and Surroundings in HO-LRGB (Jim Lindelien)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 CMa) · 16 omi01 CMa · HD50304 · HD50465 · HD50492 · HD50493 · HD50563 · HD50590 · HD50591 · HD50646 · HD50679 · HD50680 · HD50740 · HD50781 · HD50804 · HD50853 · HD50896 · HD51013 · HD51034 · HD51036 · HD51087 · HD51112 · HD51113 · HD51155 · HD51176 · HD51229 · HD51285 · HD51407 · HD51550 · HD51601 · And 5 more.

Powered byPixInsight

The Dolphin Head Nebula, Sh2-308 and Surroundings in HO-LRGB

Powered byPixInsight

The Dolphin Head Nebula, Sh2-308 and Surroundings in HO-LRGB

The Dolphin Nebula, Sh2-308 and Surroundings in HO-LRGB

Tropical Storm Calvin messed with my new moon sky this past week, so I reverted to processing this dataset that's been languishing on my SSD for 18 months. I'd struggled to process it at the time due to the dense and brilliant star field that occludes the comparatively very dim nebulae, but software tools have gotten much better since then to assist. It was time to give it another try.

All images are posted at native camera pixel resolution. Full sensor FOV (Rev. D) contains Sh2-303, Sh2-304, Sh2-308, Sh2-310, Berk75, Cr121 and NGC2271.

Camera cooling -5C. LRGB at gain 100; HO at gain 200. All bin 1x1. Dithered; 1x drizzled.

--- Sky brightness and weather
Jan 29-30 2022 SQM 21.47 17C moderate winds with gusts
Jan 30-31 2022 SQM 21.52 15C calm
Feb 01-02 2022 SQM 21.64 15C moderate winds with gusts

Comments are closed.

Final
Original
B
C
D
E

B

Description: 3840x3840

Uploaded: ...

C

Description: 16:9 7680x4320

Uploaded: ...

D

Description: Camera sensor's FOV 9413x6306 (dither cropped)

Uploaded: ...

E

Description: Portrait framed for smartphone enjoyment.

Uploaded: ...

ASI 6200 MM Pro
CMOS Imagers
WO Star 71
Narrowband imaging
Sharpless2 Objects

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	8092990
PixInsight job	WVHM9RZUIW417ZB97RVMXFDU4DH795SE
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h54m23s.62
RA (top/left)	06h50m36s.34
RA (top/right)	06h56m08s.39
RA (bottom/right)	06h58m09s.29
RA (bottom/left)	06h52m40s.20

Dec (center)	-23°55′09″.0
Dec (top/left)	-24°18′47″.1
Dec (top/right)	-24°46′52″.3
Dec (bottom/right)	-23°31′09″.4
Dec (bottom/left)	-23°03′19″.6

Image Index:

Contribution Index (beta):

The Dolphin Head Nebula, Sh2-308 and Surroundings in HO-LRGB

The Dolphin Head Nebula, Sh2-308 and Surroundings in HO-LRGB

Equipment

Acquisition details

Description

Comments

Revisions

B

C

D

E

Sky plot

Histogram

In these public groups

Image Index:

Contribution Index (beta):

The Dolphin Head Nebula, Sh2-308 and Surroundings in HO-LRGB

The Dolphin Head Nebula, Sh2-308 and Surroundings in HO-LRGB

Equipment

Acquisition details

Description

Comments

Revisions

B

C

D

E

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

Delete this revision?

Delete this revision?

Delete this revision?

Delete this revision?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information