2 Centauri
For G Centauri, see HD 108257.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 49m 26.72s[1] |
| Declination | −34° 27′ 02.8″[1] |
| Apparent magnitude (V) | +4.19 |
| Characteristics | |
| Spectral type | M4.5III |
| U−B color index | +1.45 |
| B−V color index | +1.50 |
| Variable type | semiregular |
| Astrometry | |
| Radial velocity (Rv) | +41 km/s |
| Proper motion (μ) | RA: -41.68 ± 0.23[1] mas/yr Dec.: -59.77 ± 0.18[1] mas/yr |
| Parallax (π) | 17.82 ± 0.21[1] mas |
| Distance | 183 ± 2 ly (56.1 ± 0.7 pc) |
| Absolute magnitude (MV) | +0.51 |
| Other designations | |
| Database references | |
| SIMBAD | data |
2 Centauri is a star in the constellation Centaurus.
2 Centauri is a M-type red giant with a mean apparent magnitude of +4.19. It is approximately 183 light years from Earth. It is classified as a semiregular variable star and its brightness varies from magnitude +4.16 to +4.26 with a period of 12. days.
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
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