Messier 41 in canis major (Paulo Cacella)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 12 CMa · M 41 · NGC 2287

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Messier 41 in canis major

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Messier 41 in canis major

Messier 41

M41 star map from Sirius.png

Messier 41 is seen 4 degrees south of Sirius in Canis Major

Observation data (J2000 epoch)

Constellation Canis Major

Right ascension 06h 46.0m[1]

Declination −20° 46′[1]

Distance 2,300 ly[2] (710 pc)

Apparent magnitude (V) 4.5[1]

Apparent dimensions (V) 38 arcmin[2]

Physical characteristics

Radius 12.5 ly

Estimated age 190 million yrs[3]

Other designations M41,[1] NGC 2287[1]

See also: Open cluster, List of open clusters

Messier 41 (also known as M41 or NGC 2287) is an open cluster in the constellation Canis Major. It was discovered by Giovanni Batista Hodierna before 1654 and was perhaps known to Aristotle about 325 BC.[4] M41 lies about four degrees almost exactly south of Sirius, and forms a triangle with it and Nu2 Canis Majoris—all three can be seen in the same field in binoculars. The cluster itself covers an area around the size of the full moon.[5] It contains about 100 stars including several red giants, the brightest being a spectral type K3 giant of apparent magnitude 6.3 near the cluster's center, and a number of white dwarfs.[6][7][8] The cluster is estimated to be moving away from us at 23.3 km/s.[1] The diameter of the cluster is between 25 and 26 light years. It is estimated to be 190 million years old, and cluster properties and dynamics suggest a total life expectancy of 500 million years for this cluster, before it will have disintegrated.[3]

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	Advanced success
Started	...
Astrometry.net job	2503261
PixInsight job	BTEGBDHPPFBLKFV0RMC8WNOEOBHGB37G
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h46m30s.68
RA (top/left)	06h43m42s.43
RA (top/right)	06h44m00s.66
RA (bottom/right)	06h49m17s.40
RA (bottom/left)	06h49m02s.31

Dec (center)	-20°47′01″.1
Dec (top/left)	-21°34′37″.1
Dec (top/right)	-19°56′14″.1
Dec (bottom/right)	-19°59′11″.5
Dec (bottom/left)	-21°37′30″.5

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Messier 41 in canis major

Messier 41 in canis major

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Messier 41 in canis major

Messier 41 in canis major

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