M17 SHO (Kirby Collins)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · HD167999 · HD168098 · HD168114 · HD168163 · HD168164 · HD168165 · HD168227 · HD168228 · HD168276 · HD168277 · HD168302 · HD168415 · HD168417 · HD168446 · HD168447 · HD168462 · HD168485 · HD168521 · HD168569 · HD168585 · HD168607 · HD168625 · HD168641 · HD168700 · HD168701 · HD168703 · HD168726 · HD168798 · HD168816 · And 19 more.

Powered byPixInsight

M17 SHO

Powered byPixInsight

M17 SHO

M17 in Sagittarius is a bright emission nebula commonly known as the Swan or Omega Nebula. First noted by the Swiss astronomer de Cheseaux in 1764, it was observed by Messier and added to his list later that year. Messier described it as "A train of light without stars, of 5 or 6 minutes in extent, in the shape of a spindle." He probably could only see the central core, which presents a bright spine or ridge-like structure. Williams Huggins studied its light with a spectroscope in 1866, and established that the object was in fact a cloud of glowing ionized gas.

This image is the result of two nights of imaging...I collected most of the hydrogen alpha and oxygen data on July 17, but gusty winds starting and around midnight and a layer of clouds at 2am cut things short in the middle of the sulfur sequence. The forecast for the 18th wasn't promising but I set everything up and it imaged away all night long, adding RGB and additional SII and OIII data Altogether I got 45x30 seconds each RGB, 15x300 seconds Ha, 26x300 OIII, and 28x300 SII, for a total of almost 7 hours of exposures.

This image is a milestone...with this I have at least one image of all 110 Messier objects (of varying quality).

Original
B
Final
C

B

Title: RGB + HOO

Description: Much of the detail is in the SII, so that is lost in this version

Uploaded: ...

C

Description: For this version I boosted the SII a bit, and set the black point to reduce some of the background...although there is real signal there I think that makes it more dramatic.

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	6027435
PixInsight job	C1JC3CUW2PS5A3V92MQUL2135VYN4Z6U
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h20m50s.79
RA (top/left)	18h19m30s.40
RA (top/right)	18h17m40s.73
RA (bottom/right)	18h22m12s.45
RA (bottom/left)	18h23m59s.41

Dec (center)	-16°10′11″.8
Dec (top/left)	-15°17′04″.8
Dec (top/right)	-16°43′44″.6
Dec (bottom/right)	-17°03′20″.1
Dec (bottom/left)	-15°36′29″.7

Image Index:

Contribution Index (beta):

M17 SHO

M17 SHO

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

M17 SHO

M17 SHO

Equipment

Acquisition details

Description

Comments

Revisions

B

C

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