|Observation data (J2000.0 epoch)|
|Right ascension||07h 44.6m|
|Distance||3.6 kly (1.1 kpc)|
|Apparent magnitude (V)||6.0|
|Apparent dimensions (V)||22.0′|
|Estimated age||100 million years|
|Other designations||NGC 2447|
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:
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.
- Caroline Herschel – first observer of M93 and sister of Sir William Herschel
- Messier 93 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Open Cluster M93 @ SEDS Messier pages
- Gray, Meghan;