Messier 93
| Messier 93 | |
|---|---|
 | |
| 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 |
| Other designations | NGC 2447 |
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
- Caroline Herschel – first observer of M93 and sister of Sir William Herschel
References
- ↑ Houston, Walter Scott (2005). Deep-Sky Wonders. Sky Publishing Corporation. ISBN 1-931559-23-6.
External links
- 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; Zarnecki, John. "M93 – Open Cluster". Deep Space Videos. Brady Haran.
Coordinates: 
07h 44.6m 00s, −23° 52′ 00″
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