Sh2-308 Dolphin Nebula (Jeff Rothstein)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 CMa) · The star Udra (ο1 CMa

Powered byPixInsight

Sh2-308 Dolphin Nebula

Revision title: Reprocessed 2024

Powered byPixInsight

Sh2-308 Dolphin Nebula

Revision title: Reprocessed 2024

I collected 9 nights' worth of data on the Dolphin in late January and early February, much around the full moon. From where I live, this target sat above the Tucson light dome at the Meridian. I found that the L-Enhance filter worked well but did not fully suppress the increased background light of the Moon and city, so this is an integration of just the first (and by far the best) night's data. I see increased sharpness in the stack of all 9 nights, but the contrast was much better and easier to work with in this image. That helped given the dimness of the target. Will post a version with the stack of all nights soon for comparison.

Original
B
C
Final
D

B

Title: Rev 2 Drizzled

Description: More painstaking work to bring out the dimmer parts of the nebula from the background, and abandoned failed attempt in v1 to dim Urda.

Uploaded: ...

C

Title: Reprocessed with Foraxx Palette

Description: I reprocessed this favorite image in the Foraxx palette (using Paulyman Astro's OSC Foraxx workflow) and found it much easier to bring out the blue. In fact, I had to work (with less than perfect results) to bring out the Ha signal.

Uploaded: ...

D

Title: Reprocessed 2024

Description: Here is a reprocessed version of the Dolphin using all the new Croman and Blanshan tools of the last year or so. It is also based on all the data I collected, not just one night (see original description). I'd like to think I'm also a bit better at post-processing than I was a year ago. Comments and suggestions for improvement welcome as always.

Uploaded: ...

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	Basic success
Started	...
Astrometry.net job	9142134
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

Sh2-308 Dolphin Nebula

Revision title: Reprocessed 2024

Sh2-308 Dolphin Nebula

Revision title: Reprocessed 2024

Equipment

Acquisition details

Description

Comments

Revisions

B

C

D

Sky plot

Histogram

Image Index:

Contribution Index (beta):

Sh2-308 Dolphin Nebula

Revision title: Reprocessed 2024

Sh2-308 Dolphin Nebula

Revision title: Reprocessed 2024

Equipment

Acquisition details

Description

Comments

Revisions

B

C

D

Sky plot

Histogram

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?

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