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Contains:  M 41, NGC 2287
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Messier 41 in canis major, 





    
        

            Paulo Cacella
Messier 41 in canis major

Messier 41 in canis major

Technical card

Imaging telescope or lens:William Optics FLT98

Imaging camera:ZWO ASI 1600MM-Cooled ASI1600

Mount:Sky-Watcher AZEQ6-GT

Guiding telescope or lens:Orion 400mm F/4

Filter:Astrodon RGB

Resolution: 4656x3520

Dates:Feb. 2, 2019

Frames: 4x120"

Integration: 0.1 hours

Avg. Moon age: 27.41 days

Avg. Moon phase: 5.01%

Astrometry.net job: 2503261

RA center: 6h 46' 30"

DEC center: -20° 46' 58"

Pixel scale: 1.270 arcsec/pixel

Orientation: 87.767 degrees

Field radius: 1.029

Locations: DogsHeaven Observatory, Brasilia, DF, Brazil

Data source: Backyard

Description

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]

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cacella
Paulo Cacella
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Messier 41 in canis major, 





    
        

            Paulo Cacella