M17 (Wei Li) - AstroBin

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

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M17

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M17

M17 is also known as omega nebula, swan nebula, checkmark nebula, lobster nebula or horseshoe nebula. It is a bright nebula, a HII region with tons of stars within constellation Sagittarius from milky way. M17 is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. Just like M31, it is an edge-on view from earth.

I have completed this target couple of months ago and only find time now to process it. It is so bright even 40 minutes exposure in each channel of RGB could produce a decent image. Unlike traditional narrow band image post processing, I kept RGB signal as much as possible to get reddish true color.

Subs:
Ha: 10x 1800s
S2: 12x1800s
O3: 14x1800s
R/G/B: 20x120s

Light Polluted skies
The refractors!
Cloudy Nights
Fine Art Astrophotography
Texas Astronomy
Narrowband imaging
Suburban Astrophotography

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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
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	6607549
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M17

M17

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Image Index:

Contribution Index (beta):

M17

M17

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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