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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Equuleus |
| Right ascension | 21h 13m 11.49118s[2] |
| Declination | 12° 48′ 06.1620″[2] |
| Apparent magnitude (V) | 8.7 - 15.0[3] |
| Characteristics | |
| Spectral type | M3e - M4e[3] |
| B−V color index | +1.41[4] |
| Variable type | Mira[3] |
| Astrometry | |
| Radial velocity (Rv) | −54±5[5] km/s |
| Proper motion (μ) | RA: −2.713[2] mas/yr Dec.: −11.232[2] mas/yr |
| Parallax (π) | 0.4329 ± 0.0437 mas[2] |
| Distance | approx. 7,500 ly (approx. 2,300 pc) |
| Details | |
| Mass | 3.42[6] M☉ |
| Luminosity | 33,791[7] L☉ |
| Surface gravity (log g) | −0.007[6] cgs |
| Temperature | 3,395[6] K |
| Metallicity [Fe/H] | −0.13[6] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
R Equulei is a class M Mira variable star in the constellation Equuleus. Its brightness varies between a minimum magnitude of 15.0 to a maximum of 8.7 with an average period of 261 days.[3]
References
- ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d Samus, N. N.; Durlevich, O. V.; et al. (2009), "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)", VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S, 1: B/gcvs, Bibcode:2009yCat....102025S.
- ^ Zacharias, N.; et al. (2012), "The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)", VizieR On-line Data Catalog, 1322 (2): 44, arXiv:1212.6182, Bibcode:2012yCat.1322....0Z, doi:10.1088/0004-6256/145/2/44, S2CID 119299381.
- ^ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Washington, Carnegie Institution of Washington: 0, Bibcode:1953GCRV..C......0W.
- ^ a b c d Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics, 628: A94, arXiv:1904.11302, Bibcode:2019A&A...628A..94A, doi:10.1051/0004-6361/201935765, S2CID 131780028.
- ^ 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.
- ^ "V* R Equ". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-09-17.
External links
- "R Equulei", Wolfram Alpha, retrieved 2012-08-23
