Messier 81
Messier 81 (kent as NGC 3031 or Bode's Galaxy an aw) is a spiral galaxy aboot 12 million licht-years away in the constellation Ursa Major.
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Due tae its proximity tae Yird, lairge size an active galactic nucleus (which harbors a 70 million M☉ supermassive black hole), Messier 81 haes been studied extensively bi professional astronomers. The galaxy's lairge size an relatively heicj brightness mak it a popular target for amateur astronomers an aw.
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| A Hubble Space Telescope (HST) image o Messier 81 | |
| Observation data Epoch J2000 | |
|---|---|
| Constellation | Ursa Major |
| Richt ascension | 09h 55m 33.2s |
| Declination | +69° 3′ 55″ |
| Apparent dimension (V) | 26.9 × 14.1 moa |
| Apparent magnitude (V) | 6.94 |
| Characteristics | |
| Type | SA(s)ab, LINER |
| Astrometry | |
| Helio Radial velocity | -34 ± 4km/s |
| Reidshift | -0.000113 ± 0.000013 |
| Galactocentric Velocity | 73 ± 6 km/s |
| Distance | 11.8 ± 0.4 Mly (3.62 ± 0.12 Mpc) |
| Other designations | |
NGC 3031, UGC 5318, PGC 28630, Bode's Galaxy | |
References
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