M8 and M20 (Scott Denning)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: IC 1274 · IC 4685 · Lagoon Nebula · M 20 · M 21 · M 8 · NGC 6514 · NGC 6523 · NGC 6526 · NGC 6530 · NGC 6531 · NGC 6544 · NGC 6546 · NGC 6559 · The star 4Sgr · The star 7Sgr · The star 9Sgr · Trifid Nebula

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M8 and M20

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M8 and M20

M8 and M20 with only 5.5 minutes of exposure with modified 40D!

Collected July 11, 2015, moonless night at Medicine Bow Cabin with Borg 71 FL and 0.66 reducer (264 mm), guided with 100 mm lens and SX Lodestar.

Beginning of an HDR composite with exposures of 30, 60, 90, and 120 s

Unfortunately only got a single cycle of exposures plus one additional 30 s shot before clouds rolled in and covered the Galactic Center

Captured in TSX Pro, guided by PHD2

Processed in PixInsight:

1. No image calibration!

2. Aligned and averaged 2 x 30 s exposures

3. HDR composite of 30, 60, 90, 120 s subs

4. Histogram stretch

5. ACDNR noise reduction, twice (on=e gentle one with weak masking, one very strong with aggressive lightness mask)

6. SCNR to remove green noise

7. Curves transformation to boost saturation

8. Final histogram stretch to boost red and blue

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	4220719
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M8 and M20

M8 and M20

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Image Index:

Contribution Index (beta):

M8 and M20

M8 and M20

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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