R Virginis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas[2] |
| Distance | 1,730 ± 90 ly (530 ± 30 pc) |
| Details | |
| Mass | 2.18[7] M☉ |
| Radius | 130[8] R☉ |
| Surface gravity (log g) | 0.44[7] cgs |
| Temperature | 3,300[7]–3,800[8] K |
| Metallicity [Fe/H] | +0.49[7] dex |
| 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.[9]
References
[edit]- ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c VSX (4 January 2010). "R Virginis". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 May 2014.
- ^ 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. Bibcode:1974ApJS...28..271K. doi:10.1086/190318.
- ^ a b 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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ a b c d Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardèvol, J.; Casamiquela, L.; Figueras, F.; Jiménez-Arranz, Ó.; Jordi, C.; Monguió, M.; Romero-Gómez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T. (2022-02-01). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy and Astrophysics. 658: A91. Bibcode:2022A&A...658A..91A. doi:10.1051/0004-6361/202142369. ISSN 0004-6361.
- ^ a b Eisner, J. A.; Graham, J. R.; Akeson, R. L.; Ligon, E. R.; Colavita, M. M.; Basri, G.; Summers, K.; Ragland, S.; Booth, A. (2006-12-07). "Stellar and Molecular Radii of a Mira Star: First Observations with the Keck Interferometer Grism". The Astrophysical Journal. 654 (1): L77. doi:10.1086/510717. ISSN 0004-637X.
- ^ Zsoldos, E. (1994). "Three Early Variable Star Catalogues". Journal for the History of Astronomy. 25 (2): 92–98. Bibcode:1994JHA....25...92Z. doi:10.1177/002182869402500202. S2CID 117099222.
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