Messier 3
Messier 3 (M3; also NGC 5272) is a globular cluster of stars in the northern constellation of Canes Venatici.
| Messier 3 | |
|---|---|
Globular cluster Messier 3 in Canes Venatici | |
| Observation data (J2000 epoch) | |
| Class | VI |
| Constellation | Canes Venatici |
| Right ascension | 13h 42m 11.62s |
| Declination | +28° 22′ 38.2″ |
| Distance | 33.9 kly (10.4 kpc) |
| Apparent magnitude (V) | 6.39 |
| Apparent dimensions (V) | 18′.0 |
| Physical characteristics | |
| Absolute magnitude | -8.93 |
| Mass | 4.5×105 M☉ |
| Radius | 90 ly |
| Tidal radius | 113 ly (30 pc)[mean] |
| Metallicity | = –1.34 dex |
| Estimated age | 11.39 Gyr |
| Other designations | NGC 5272 |
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