M8 + M20 only 19 minutes exposure, but very deep (Roger Clark)

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

M8 + M20 only 19 minutes exposure, but very deep, Roger Clark

Powered byPixInsight

M8 + M20 only 19 minutes exposure, but very deep

Powered byPixInsight

M8 + M20 only 19 minutes exposure, but very deep

This image was obtained with a Canon 7D Mark II 20-megapixel digital camera and 300 mm f/2.8

L IS II lens at f/2.8 and ISO 1600. No dark frame subtraction, no flat fields. Tracking with

an Astrotrac and no guiding. Nineteen minutes total exposure (19 1-minute exposures). The image was made in very bad seeing and I used only have the frames I took.

This is a natural color image. The high dynamic range of astrophotos must be stretched to

bring out the range of details the camera recorded. But the typical image stretch process

loses color for brighter subjects (e.g. stars and the brighter parts of the galaxy become

whiter as they are made brighter). This image uses a new algorithm that does not lose color

during the stretch. The new algorithm enables fainter details to be shown and with less

noise. This new free program will be available soon.

More information on the gallery page:

http://www.clarkvision.com/galleries/gallery.NEW/web/m8+m20.rnclark.c08.12.2015.19frames-t4rs50-d-0.5x-c1s.html

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	1311553
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

M8 + M20 only 19 minutes exposure, but very deep

M8 + M20 only 19 minutes exposure, but very deep

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

Image Index:

Contribution Index (beta):

M8 + M20 only 19 minutes exposure, but very deep

M8 + M20 only 19 minutes exposure, but very deep

Equipment

Acquisition details

Description

Comments

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?

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