NGC 2546 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Puppis (Pup) · Contains: NGC 2546 · PGC 2807070 · PGC 3085166

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NGC 2546

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NGC 2546

This object is an open star cluster located 3200 light years away in the constellation of Puppis at a declination of -37 degrees. This magnitude 6 cluster of 40 stars spans 1 degree in our apparent view, which corresponds to a diameter of 60 light years.

The cluster does not stand out extremely well from the background. As with any cluster, it helps to stare at an isolated part of the background away from the cluster for awhile (say, the lower right corner area), until you eyes adjust to the background field. It is then easy to spot the cluster, which spans in an irregular shape from lower left to upper right.

An interesting carbon star (BM IV 68) can be seen in the high resolution view just to the right of the center of the image. It is identifiable by its deep red star border, deep orange central region, and tiny size. Several other smaller carbon stars can be seen in the lower left of the cluster.

Some call this the Wounded Heart cluster or the Heart & Dagger cluster, both of which are a huge stretch of the imagination for me. It continues to amaze, as seen in the Letters section of the latest Jan 2020 Sky & Telescope magazine, why humans insist on forcing names that don't fit on these beautiful objects.

ZWO ASI183/QHY183
The refractors!
Cloudy Nights
Open Star Clusters
Takahashi Refractors

Hidden Treasures Catalog (Complete*)
Open Clusters

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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	3113701
PixInsight job	GAJ8GJ9LPESIQ80PJUNXQVYFPZ6DYNHD
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	08h12m16s.63
RA (top/left)	08h17m50s.11
RA (top/right)	08h06m52s.24
RA (bottom/right)	08h06m34s.66
RA (bottom/left)	08h17m48s.30

Dec (center)	-37°35′36″.4
Dec (top/left)	-36°46′38″.2
Dec (top/right)	-36°44′05″.10
Dec (bottom/right)	-38°23′32″.5
Dec (bottom/left)	-38°26′10″.2

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