Astronomy:R Equulei
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Short description: Star in the constellation of Equuleus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[2] mas |
| 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. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 Samus, N. N. 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, doi:10.1088/0004-6256/145/2/44, Bibcode: 2012yCat.1322....0Z.
- ↑ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Washington (Carnegie Institution of Washington): 0, Bibcode: 1953GCRV..C......0W.
- ↑ 6.0 6.1 6.2 6.3 Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A. et al. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics 628: A94, doi:10.1051/0004-6361/201935765, Bibcode: 2019A&A...628A..94A.
- ↑ 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.
- ↑ "V* R Equ". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+R+Equ.
External links
- "R Equulei", Wolfram Alpha, http://www.wolframalpha.com/input/?i=R+Equulei, retrieved 2012-08-23
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