| NGC 5272 | |
|---|---|
 |
|
| Observation data (J2000 epoch) | |
| Class | VI |
| Constellation | Canes Venatici |
| Right ascension | 13h 42m 11.23s[1] |
| Declination | 28° 22′ 31.6″[1] |
| Distance | 33.9 kly (10.4 kpc) |
| Apparent magnitude (V) | +6.2[1] |
| Apparent dimensions (V) | 18′.0 |
| Physical characteristics | |
| Mass | 4.87 x 1035 kg kg (245 000 M ) |
| Radius | 90 ly |
| VHB | - |
| Estimated age | 8 x 109 years |
| Notable features | - |
| Other designations | NGC 5272[1] |
| See also: Globular cluster, List of globular clusters | |
Messier 3 (also known as M3 or NGC 5272) is a globular cluster in the constellation Canes Venatici. It was discovered by Charles Messier in 1764, and resolved into stars by William Herschel around 1784. This cluster is one of the largest and brightest, and is made up of around 500,000 stars. It is located at a distance of about 33,900 light-years away from Earth. M3 has an apparent magnitude of 6.2, making it visible to the naked eye under dark conditions. From a moderate-sized telescope, the cluster is fully defined.
External links
- SEDS Messier pages on M3
- M3, Galactic Globular Clusters Database page
- Messier 3 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
References
- ^ a b c d "SIMBAD Astronomical Database". Results for NGC 5272. http://simbad.u-strasbg.fr/Simbad. Retrieved 2006-11-15.
Coordinates: 
13h 42m 11.23s, +28° 22′ 31.6″
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