Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB (Ian Parr)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: M 7 · NGC 6475 · Ptolemy's Cluster

Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB, Ian Parr

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Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB

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Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB

Messier 7, sometimes known as the Ptolemy Cluster, is an open cluster of stars in the constellation of Scorpius.

The cluster is an easily visible companion to M6 close to the tail of Scorpius and is the southernmost Messier object.

Laying on a blanket with a pair of binoculars and looking straight up into the heart of Milky Way in Winter is about as good as it gets IMHO.

This object has a lot more background stars than M6 and some nice dark lanes.

With an object like this less is more when it comes to processing and BlurXterminator is used for correction and .2 Star Reduction on each channel before combination and no Non Stellar Sharrpening is used or the background turns to worms. Just a touch of Local Histogram Equalisation before a final soft touch of NoiseXTerminator.

I got sick of the amount of work mosaics take so the venerable 127is will be coming off the MYT soon and is being replaced (for now) with a Red Cat 71.

My 9 year old QSI 690 Wsg8 CCD is being finally being upgraded to a ZWO ASI2600MMPro CMOS camera with Antila 3nm NB and LRGB filters and will unleashed on the Australian winter sky which should be very interesting, esp. if I can get some time outback under real dark skies.

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	8315778
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB

Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB

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Image Index:

Contribution Index (beta):

Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB

Messier 7 (NGC 6475) Ptolemy's Cluster in Scorpius in RGB

Equipment

Acquisition details

Description

Comments

Sky plot

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