Astronomy:Kappa2 Lupi
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Short description: Star in the constellation Lupus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 11m 57.67549s[1] |
| Declination | −48° 44′ 37.3397″[1] |
| Apparent magnitude (V) | 5.70[2] |
| Characteristics | |
| Spectral type | A3/5V[3] or A3IV[4] |
| B−V color index | +0.144±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | +0.0±3.7[5] km/s |
| Proper motion (μ) | RA: −98.451[1] mas/yr Dec.: −43.845[1] mas/yr |
| Parallax (π) | 18.0050 ± 0.1136[1] mas |
| Distance | 181 ± 1 ly (55.5 ± 0.4 pc) |
| Details | |
| Metallicity [Fe/H] | −0.01[6] dex |
| Rotational velocity (v sin i) | 160.4±1.0[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
κ2 Lupi, Latinized as Kappa2 Lupi, is a white-hued star in the southern constellation of Lupus, and forms a double star with Kappa1 Lupi.[9] It is visible to the naked eye as a dim point of light with an apparent visual magnitude is 5.64. This star is located around 181 light years distant from the Sun. It is an A-type main-sequence star with a stellar classification of A3/5V.[3] However, Levato (1973) classed the star as A3IV, which would suggest it is already evolving off the main sequence.[4] The star has a high rotation rate, showing a projected rotational velocity of 160 km/s.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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.
- ↑ 2.0 2.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.
- ↑ 4.0 4.1 Levato, H. (January 1975), "Rotational velocities and spectral types for a sample of binary systems", Astronomy and Astrophysics Supplement Series 19: 91–99, Bibcode: 1975A&AS...19...91L.
- ↑ Kharchenko, N. V. et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten 328 (9): 889, doi:10.1002/asna.200710776, Bibcode: 2007AN....328..889K.
- ↑ Netopil, Martin (August 2017), "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system", Monthly Notices of the Royal Astronomical Society 469 (3): 3042–3055, doi:10.1093/mnras/stx1077, Bibcode: 2017MNRAS.469.3042N.
- ↑ 7.0 7.1 Díaz, C. G. et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics 531: A143, doi:10.1051/0004-6361/201016386, Bibcode: 2011A&A...531A.143D.
- ↑ "kap02 lup". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=kap02+lup.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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