R Virginis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 38m 29.934s[1] |
| Declination | +06° 59′ 19.03″[1] |
| Apparent magnitude (V) | 7.48[2] |
| Characteristics | |
| Spectral type | M3.5-7e[2] |
| U−B color index | 1.22[2] |
| B−V color index | 1.56[2] |
| Variable type | Mira[3] |
| Astrometry | |
| Radial velocity (Rv) | -26.60[2] km/s |
| Proper motion (μ) | RA: -32.49 ± 0.77[1] mas/yr Dec.: 4.59 ± 0.87[1] mas/yr |
| Parallax (π) | 1.65 ± 0.85[1] mas |
| Distance | approx. 2,000 ly (approx. 600 pc) |
| Absolute magnitude (MV) | −1.43 |
| Other designations | |
R Virginis is a Mira variable in the constellation Virgo. Located approximately 606 parsecs (1,980 ly) distant, it varies between magnitudes 6.1 and 12.1 over a period of approximately 146 days.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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
- ↑ 2.0 2.1 2.2 2.3 2.4 "R Virginis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 24 June 2014.
- ↑ 3.0 3.1 VSX (4 January 2010). "R Virginis". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 May 2014.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||