6 Equulei
| Observation data Epoch J2000 (ICRS) Equinox J2000 (ICRS) | |
|---|---|
| Constellation | Equuleus |
| Right ascension | 21h 10m 31.31410s[1] |
| Declination | 10° 02′ 56.1112″[1] |
| Apparent magnitude (V) | 6.07[2] |
| Characteristics | |
| Spectral type | A2 Vs[3] (A1 Si Sr Cr)[4] |
| U−B color index | +0.04[2] |
| B−V color index | +0.02[2] |
| Astrometry | |
| Radial velocity (Rv) | +6.9[5] km/s |
| Proper motion (μ) | RA: –0.50[1] mas/yr Dec.: +16.40[1] mas/yr |
| Parallax (π) | 7.36 ± 0.81 mas[1] |
| Distance | approx. 440 ly (approx. 140 pc) |
| Absolute magnitude (MV) | +0.236[3] |
| Details | |
| Mass | 2.4[3] M☉ |
| Radius | 1.7[6] R☉ |
| Luminosity | 59[3] L☉ |
| Temperature | 9000[3] K |
| Rotational velocity (v sin i) | 65[7] km/s |
| Age | 970[3] Myr |
| Other designations | |
6 Equulei is an A-type main sequence star in the constellation of Equuleus with an apparent magnitude of 6.07.
6 Equulei is an optical double of Gamma Equulei, at a separation of 339.13 arcseconds. 6 Equulei is also known as Gamma Equulei D;[citation needed] however this doesn't mean it orbits Gamma Equulei A, B, C, as in Celestia it shows 6 Equulei is separated at about 0.18 light years from the Gamma Equulei triple star system.
References
- ^ a b c d e van Leeuwen, F. (November 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.
- ^ a b c Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J
- ^ a b c d e f "HD 104538", WolframAlpha, retrieved 2012-08-05
- ^ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
- ^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
- ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
- ^ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224.
- ^ "6 Equ -- Star in double system", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-25.
External links
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