Messier 93

Messier 93
Messier 93
Messier object 093.jpg
Observation data (J2000.0 epoch)
Right ascension 07h 44.6m
Declination −23° 52′
Distance 3.6 kly (1.1 kpc)
Apparent magnitude (V) 6.0
Apparent dimensions (V) 22.0′
Physical characteristics
Radius 10
Estimated age 100 million years[citation needed]
Other designations NGC 2447
See also: Open cluster, List of open clusters

Messier 93 (also known as M 93 or NGC 2447) is an open cluster in the constellation Puppis. It was discovered by Charles Messier in 1781.

M93 is at a distance of about 3,600 light years from Earth and has a spatial radius of some 10 to 12 light years. Its age is estimated at some 100 million years.

Walter Scott Houston described its appearance as follows:[1]

Some observers mention the cluster as having the shape of a starfish. With a fair-sized telescope, this is its appearance on a dull night, but [a four-inch refractor] shows it as a typical star-studded galactic cluster.

References

  1. ^ Houston, Walter Scott (2005). Deep-Sky Wonders. Sky Publishing Corporation. ISBN 1931559236. 

External links

Coordinates: Sky map 07h 44.6m 00s, −23° 52′ 00″



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