Prawn Nebula (John R Carter, Sr.)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: IC 4628

Powered byPixInsight

Prawn Nebula

Powered byPixInsight

Prawn Nebula

Wikipedia: Prawn Nebula, also known as IC 4628, is an emission nebula located in the Sagittarius Arm of the Milky Way, around 6,000 light-years from Earth in the constellation Scorpius. It forms part of the tail of the "False Comet" anchored by the bright open cluster NGC 6231.

This was a fluke image for me. Extremely low on the horizon at 4:05 AM - just barely above the observatory wall. No time to take more than a single exposure.

Thanks to what I have learned about PixInsight, I managed to get something out of it anyway.

The original image was extremely noisy. I separated the stars from the background and processed them separately, then merged.

What I'm not pleased with is the focus. The autofocus of N.I.N.A. didn't do as good this time as I would have liked. Pixel-peeping shows holes in the stars as a result.

Original
B
Final
D

B

Description: This is a retake using 42 subs combined with darks, flats, and darkflats.
The centering is off a bit from the original.
Again, the image is barely above where my telescope can see over the wall of the observatory. I would normally not bother with anything this low.
As to it being called the Prawn Nebula, it took me a long time see it like that.

Uploaded: ...

D

Description: Inverted and sharpened. Replaces a previous version C with not so much color saturation.

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	Advanced success
Started	...
Astrometry.net job	4491881
PixInsight job	B4NV05R1C3B29M1X8PMTKMFZ05CUNXC0
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	16h56m41s.70
RA (top/left)	16h59m19s.74
RA (top/right)	16h54m02s.41
RA (bottom/right)	16h54m01s.32
RA (bottom/left)	16h59m22s.53

Dec (center)	-40°35′29″.8
Dec (top/left)	-40°11′10″.5
Dec (top/right)	-40°11′25″.1
Dec (bottom/right)	-40°59′38″.8
Dec (bottom/left)	-40°59′25″.6

Image Index:

Contribution Index (beta):

Prawn Nebula

Prawn Nebula

Equipment

Acquisition details

Description

Comments

Revisions

B

D

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Prawn Nebula

Prawn Nebula

Equipment

Acquisition details

Description

Comments

Revisions

B

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?

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