V Centauri

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V Centauri
VCenLightCurve.png
A light curve for V Centauri, plotted from Hipparcos data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 14h 32m 33.0835s[2]
Declination −56° 53′ 15.775″[2]
Apparent magnitude (V) 6.72[3]
Characteristics
Spectral type F5 Ib/II[4]
B−V color index 0.87[3]
Variable type Classical Cepheid[3]
Astrometry
Radial velocity (Rv)−18.90 ± 1.4[5] km/s
Proper motion (μ) RA: −7.14[6] mas/yr
Dec.: −7.48[6] mas/yr
Parallax (π)1.30 ± 0.42[2] mas
Distanceapprox. 2,500 ly
(approx. 800 pc)
Other designations
V Cen, CD−56° 5479, HD 127297, HIP 71116, HR 5421, SAO 241777[3]
Database references
SIMBADdata

V Centauri (V Cen) is a Classical Cepheid variable, a type of variable star, in the constellation Centaurus. Its apparent magnitude is 6.72,[3] and it is approximately 2,500 light-years (800 parsecs) away based on parallax.[2] 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).[7] 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.[7]

References[]

  1. ^ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  2. ^ a b c d 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.
  3. ^ a b c d e "V* V Cen". SIMBAD. Centre de données astronomiques de Strasbourg.
  4. ^ 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.
  5. ^ 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.
  6. ^ a b 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.
  7. ^ a b 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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