HD 6114

HD 6114
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
HD 6114 A
Right ascension 01h 03m 01.54722s[1]
Declination +47° 22′ 34.1796″[1]
Apparent magnitude (V) 6.76[2]
HD 6114 B
Right ascension 01h 03m 01.55854s[3]
Declination +47° 22′ 33.0207″[3]
Apparent magnitude (V) 8.07[2]
Characteristics
Spectral type A9 V[4][5]
Apparent magnitude (V) 6.46[6]
B−V color index 0.248±0.012[6]
Astrometry
HD 6114 A
Radial velocity (Rv)+2.4±2.8[7] km/s
Proper motion (μ) RA: 87.411±0.040[1] mas/yr
Dec.: −15.153±0.024[1] mas/yr
Parallax (π)9.2058 ± 0.0392 mas[1]
Distance354 ± 2 ly
(108.6 ± 0.5 pc)
Absolute magnitude (MV)1.56[6]
HD 6114 B
Proper motion (μ) RA: 87.190±0.103[3] mas/yr
Dec.: −23.426±0.042[3] mas/yr
Parallax (π)9.4797 ± 0.0651 mas[3]
Distance344 ± 2 ly
(105.5 ± 0.7 pc)
Orbit[8]
Period (P)450 yr
Semi-major axis (a)0.816″
Eccentricity (e)0.80
Inclination (i)87.0°
Longitude of the node (Ω)176.7°
Periastron epoch (T)1902.0
Argument of periastron (ω)
(secondary)		180°
Details
HD 6114 A
Mass1.65[9] M☉
Luminosity21.2+3.5
−3.0[10] L☉
Surface gravity (log g)4.03±0.14[9] cgs
Temperature7,611±259[9] K
Rotational velocity (v sin i)149[10] km/s
Age863[9] Myr
Other designations
BD+46° 243, HD 6114, HIP 4911, HR 289, SAO 36875, ADS 862, WDS J01030+4723[11]
Database references
SIMBADdata

HD 6114 is a visual binary star system in the northern constellation of Andromeda. With a combined apparent magnitude of 6.46,[6] the star can only be seen with the naked eye by keen-eyed observers even on the best of nights. Based upon an annual parallax shift of 10.4 mas[1] as seen from Earth's orbit, the system is located approximately 108 parsecs (350 ly) distant.

The binary nature of this system was discovered by O. Struve in 1864. It consists of a magnitude 6.76 primary component with a dimmer magnitude 8.07 secondary. As of 2015 the pair had an angular separation of 1.30″ along a position angle of 175°.[2] The two stars orbit each other with a period of 450 years with an eccentricity of 0.80.[8]

The primary is an A-type main-sequence star with a stellar classification of A9 V.[4][5] At the estimated age of 863 million years, it is spinning rapidly with a projected rotational velocity of 149 km/s.[10] The star has 1.65[9] times the mass of the Sun and is radiating 21[10] times the Sun's luminosity from its photosphere at an effective temperature of 7,611 K.[9]

References

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b c Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
  3. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  4. ^ a b Cowley, A.; Fraquelli, D. (1974). "MK Spectral Types for Some Bright F Stars". Publications of the Astronomical Society of the Pacific. 86 (509): 70. Bibcode:1974PASP...86...70C. doi:10.1086/129562.
  5. ^ a b Abt, H. A.; Morrell, N. I. (July 1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182.
  6. ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  7. ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
  8. ^ a b Hartkopf, W. I.; et al. (June 30, 2006). "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 2017-08-01. Retrieved 2018-10-12. {{cite journal}}: Cite journal requires |journal= (help)
  9. ^ a b c d e f David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607.
  10. ^ a b c d Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789.
  11. ^ "HD 6114". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 12, 2018.