Astronomy:R Virginis
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Short description: Star in the constellation Virgo
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 38m 29.9338s[2] |
| Declination | +06° 59′ 19.0256″[2] |
| Apparent magnitude (V) | 6.1 - 12.1[3] |
| Characteristics | |
| Spectral type | M3.5-7e[4] |
| U−B color index | 1.22[5] |
| B−V color index | 1.56[5] |
| Variable type | Mira[3] |
| Astrometry | |
| Radial velocity (Rv) | −26.60[6] km/s |
| Proper motion (μ) | RA: −32.283±0.248[2] mas/yr Dec.: 4.483±0.186[2] mas/yr |
| Parallax (π) | 1.8884 ± 0.0946[2] mas |
| Distance | 1,730 ± 90 ly (530 ± 30 pc) |
| Details | |
| Radius | 88[2] R☉ |
| Luminosity | 839[2] L☉ |
| Temperature | 3,320[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
R Virginis is a Mira variable in the constellation Virgo. Located approximately 530 parsecs (1,700 ly) distant, it varies between magnitudes 6.1 and 12.1 over a period of approximately 146 days.[3] Its variable nature was discovered by Karl Ludwig Harding in 1809.[7]
References
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 VSX (4 January 2010). "R Virginis". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=37809.
- ↑ Keenan, Philip C.; Garrison, Robert F.; Deutsch, Armin J. (1974). "Revised Catalog of Spectra of Mira Variables of Types ME and Se". The Astrophysical Journal Supplement Series 28: 271. doi:10.1086/190318. Bibcode: 1974ApJS...28..271K.
- ↑ 5.0 5.1 Ducati, J. R. (2002). "VizieR On-line Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR On-line Data Catalog. Bibcode: 2002yCat.2237....0D.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ Zsoldos, E. (1994). "Three Early Variable Star Catalogues". Journal for the History of Astronomy 25 (2): 92–98. doi:10.1177/002182869402500202. Bibcode: 1994JHA....25...92Z.
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