Astronomy:HD 6114

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Short description: Binary star system in the constellation Andromeda
HD 6114
Observation data
{{#ifeq:J2000.0|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000.0      [[Astronomy:Equinox (celestial coordinates)|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[1] mas
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[3] mas
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. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 Mason, B. D. et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal 122 (6): 3466–3471. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  4. ↑ 4.0 4.1 Cowley, A.; Fraquelli, D. (1974). "MK Spectral Types for Some Bright F Stars". Publications of the Astronomical Society of the Pacific 86 (509): 70. doi:10.1086/129562. Bibcode: 1974PASP...86...70C. 
  5. ↑ 5.0 5.1 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, doi:10.1086/192182, Bibcode: 1995ApJS...99..135A. 
  6. ↑ 6.0 6.1 6.2 6.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  8. ↑ 8.0 8.1 Hartkopf, W. I. et al. (June 30, 2006). Sixth Catalog of Orbits of Visual Binary Stars. United States Naval Observatory. http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6. Retrieved 2018-10-12. 
  9. ↑ 9.0 9.1 9.2 9.3 9.4 9.5 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. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D. 
  10. ↑ 10.0 10.1 10.2 10.3 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z. 
  11. ↑ "HD 6114". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+6114. 



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