V Centauri
V Centauri (V Cen) is a Classical Cepheid variable, a type of variable star, in the constellation Centaurus. Its apparent magnitude is 6.72,[2] and it is approximately 2,500 light-years (800 parsecs) away based on parallax.[1] According to the South African Astronomical Observatory, the chemical composition was derived as being high in sodium (Na) and aluminium (Al) and low in magnesium (Mg).[6] Following a normal composition for a Cepheid star, V Cen does not have any unusual characteristics. V Centauri's composition was observed alongside six other Classical Cepheid variable stars with the support of Russian, Chilean, and Ukrainian observatories.[6]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 32m 33.0835s[1] |
| Declination | −56° 53′ 15.775″[1] |
| Apparent magnitude (V) | 6.72[2] |
| Characteristics | |
| Spectral type | F5 Ib/II[3] |
| B−V color index | 0.87[2] |
| Variable type | Classical Cepheid[2] |
| Astrometry | |
| Radial velocity (Rv) | −18.90 ± 1.4[4] km/s |
| Proper motion (μ) | RA: −7.14[5] mas/yr Dec.: −7.48[5] mas/yr |
| Parallax (π) | 1.30 ± 0.42[1] mas |
| Distance | approx. 2,500 ly (approx. 800 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
- Gaia Collaboration (2016). "Gaia Data Release 1". Astronomy & Astrophysics. 595: A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.
- "V* V Cen". SIMBAD. Centre de données astronomiques de Strasbourg.
- Houk, N.; Cowley, A. P. (1975). "University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90°.0 to -53°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. 1. Bibcode:1975mcts.book.....H.
- 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.
- van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
- Usenko, I. A.; Kniazev, A. Yu; Berdnikov, L. N.; Kravtsov, V. V.; Fokin, A. B. (2013-07-01). "Spectroscopic studies of southern-hemisphere Cepheids: Six objects in Centaurus (V Cen, V737 Cen) and Sagittarius (BB Sgr, W Sgr, X Sgr, Y Sgr)". Astronomy Letters. 39 (7): 432–445. Bibcode:2013AstL...39..432U. doi:10.1134/S1063773713070074. ISSN 1063-7737. S2CID 121213614.
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