6 Equulei

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[1] mas
Distanceapprox. 440 ly
(approx. 140 pc)
Absolute magnitude (MV)+0.236[3]
Details
Mass2.4[3] M
Radius1.7[6] R
Luminosity59[3] L
Temperature9000[3] K
Rotational velocity (v sin i)65[7] km/s
Age970[3] Myr
Other designations
γ Equulei D, BD+09 4735, HD 201616, HIP 104538, HR8098, SAO 126597.[8]

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; 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

  1. 1.0 1.1 1.2 1.3 1.4 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.
  2. 2.0 2.1 2.2 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
  3. 3.0 3.1 3.2 3.3 3.4 3.5 "HD 104538", WolframAlpha, retrieved 2012-08-05
  4. 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.
  5. Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495......
  6. 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.
  7. 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.
  8. "6 Equ -- Star in double system", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-25.

External links