M17 Region (Götz Golla)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Checkmark Nebula · IC 4701 · IC 4706 · IC 4707 · Lobster Nebula · M 17 · M 18 · NGC 6596 · NGC 6605 · NGC 6613 · NGC 6618 · Swan Nebula · omega Nebula

Powered byPixInsight

M17 Region

Powered byPixInsight

M17 Region

M17 has a maximum altitude of only 25deg at my site. When it rises above the trees right now there are only 2.5 hours before morning twilight. This make it a challenging target.

Since I dont have RGB Filters, I used Halpha, SII und OIII narrowband filters instead. When combining them to a color image with Siril, I have first set the colors to the true colors of these emission lines and used just a little adjustment in the saturation und dark levels. I like the resulting warm colors.

The second version was inspired by another astrobin user. Even though in Siril it is not possible to combine several images into one channel with weights, it is possible to use the three narrowband images several times with several colors (different or the same) to compose an RGB image. For the final image I used

R: Ha, SII

G: Ha, OIII

B: 2xOIII

After some color processing in rawtherapee, I find the result very beautiful.

The third version was processed with the channel mixer of rawtherapee, which is ideal for weighted combination of images into the color channels.

Original
C
Final
D

C

Description: New version with different color processing in Siril

Uploaded: ...

D

Description: This image was processed differently. I composed a simple RGB image with Ha, SII and OIII in Siril. Then I used the channel mixer of rawtherapee to redistribute Ha, SII and OIII to the RG and B channels as follows
R: 40% Ha, 90% SII, -5% OIII (!)
G: 37% Ha, 0% SII, 43% OIII
B: 0% Ha, 0% SII, 100% OIII
I find that rawtherapees channel mixer is a very convenient tool to create beautiful color images.

Uploaded: ...

Astrophotography Germany

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	4679612
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

M17 Region

M17 Region

Equipment

Acquisition details

Description

Comments

Revisions

C

D

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

M17 Region

M17 Region

Equipment

Acquisition details

Description

Comments

Revisions

C

D

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?

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