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R Virginis

R Virginis

The visual band light curve of R Virginis, from AAVSO data[1]
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]
Distance1,730 ± 90 ly
(530 ± 30 pc)
Details
Mass2.18[7] M☉
Radius130[8] R☉
Surface gravity (log g)0.44[7] cgs
Temperature3,300[7]–3,800[8] K
Metallicity [Fe/H]+0.49[7] dex
Other designations
R Virginis, TYC 295-2-1, AG+07° 1658, HD 109914, BD+07°2561, DO 3264, HIP 61667, GC 17212, HR 4808, RAFGL 4157, SAO 119509
Database references
SIMBADdata

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]
  1. ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ 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.
  3. ^ a b c VSX (4 January 2010). "R Virginis". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 May 2014.
  4. ^ 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.
  5. ^ 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.
  6. ^ 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.
  7. ^ 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. arXiv:2111.01860. Bibcode:2022A&A...658A..91A. doi:10.1051/0004-6361/202142369. ISSN 0004-6361.
  8. ^ 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. arXiv:astro-ph/0611312. doi:10.1086/510717. ISSN 0004-637X.
  9. ^ 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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