Messier 93

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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 M93 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.

See also[edit]


  1. ^ Houston, Walter Scott (2005). Deep-Sky Wonders. Sky Publishing Corporation. ISBN 1-931559-23-6.

External links[edit]

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