Trifid Nebula M20 (Mike Bleiweiss)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · M 20 · M 21 · NGC 6514 · NGC 6531 · Sh2-30 · Trifid Nebula

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Trifid Nebula M20

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Trifid Nebula M20

This image was some firsts for me:

- First time using a remote observatory beside the one in my backyard. Remotely running a scope in Chile vs remotely running a scope in my backyard are two very different things, yet was all the same to my PC. My wife is amazing for getting me telescope time in Chile as an anniversary present.

- First time using Pixinsight. From raw fits files to finished product. Yeah I'm gonna need about 5 more years of practice with that, and maybe a university course or two (or ten). This end product is some basic stuff, I couldn't even get it to drizzle without punching a hole in the "red" stack. But, it's a start, and I pulled it off! (maybe)

- First time working with monochrome data. Yeah now I really want a monochrome camera. There is power I hadn't realized not just in greater sensitivity outside under the sky - but being able to play with individual raw channels in data processing is pretty sweet.

On to the photo:

Wow! Chilescope is awesome. I was nervous, wondered if it would work, had no idea what imaging with a 500mm f/3.6 scope under a perfect sky with excellent seeing with a camera I've never used - I spent about 3 hours just double and triple checking my "math" on how long I should expose and what my integration time should be and should I do luminance, etc. Figured I would bomb the first imaging run and learn some things and then maybe have a passable image on the next run.

This is:

5 subs at 600 secs Red

5 subs at 600 secs Blue

4 subs at 600 secs Green

20 flat (60 total R,G,B)

20 bias

20 dark

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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
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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	4739558
PixInsight job	7EX8C06LV7Y1JJSWLHYKY6766AH970UJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h02m42s.328
RA (top/left)	18h05m03s.832
RA (top/right)	18h04m58s.521
RA (bottom/right)	18h00m21s.796
RA (bottom/left)	18h00m25s.760

Dec (center)	-22°58′47″.37
Dec (top/left)	-23°30′08″.92
Dec (top/right)	-22°26′17″.30
Dec (bottom/right)	-22°27′16″.50
Dec (bottom/left)	-23°31′08″.10

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Trifid Nebula M20

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