Astronomy:HD 2767

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Short description: Double star in the constellation Andromeda
HD 2767
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda[1]
Right ascension  00h 31m 25.6379s[2]
Declination +33° 34′ 53.892″[2]
Apparent magnitude (V) 5.88[3]
Characteristics
Evolutionary stage red giant branch[2]
Spectral type K1III[3]
B−V color index 1.13[3]
Astrometry
Radial velocity (Rv)3.398±0.114[3] km/s
Proper motion (μ) RA: 50.788±0.049[2] mas/yr
Dec.: −10.707±0.034[2] mas/yr
Parallax (π)8.5954 ± 0.0582[2] mas
Distance379 ± 3 ly
(116.3 ± 0.8 pc)
Absolute magnitude (MV)+0.56[1]
Details
Mass2.86[4] M☉
Radius14.7[5] R☉
Luminosity51[5] L☉
Surface gravity (log g)2.54[4] cgs
Temperature4,023[5] K
Age376[2] Myr
Other designations
HIP 2475, HR 122, BD+32°80, SAO 53956
Database references
SIMBADdata

HD 2767 is the primary component of a double star located 116 parsecs (379 ly) away in the constellation Andromeda. It is a red giant with a spectral type of K1III and an apparent magnitude of 5.88, thus is visible by the naked eye under favourable conditions.[3]

The secondary is named BD+32 81, has an apparent magnitude of 9.28, and is an F-type star; it shares radial velocity, parallax and proper motion with the primary component. The distance from the primary is estimated as 6,536 AU,[3] while their separation in the sky is 56 arcseconds.[6]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Halbwachs, J. -L; Mayor, M.; Udry, S. (2017). "Double stars with wide separations in the AGK3 - II. The wide binaries and the multiple systems". Monthly Notices of the Royal Astronomical Society 464 (4): 4966. doi:10.1093/mnras/stw2683. Bibcode: 2017MNRAS.464.4966H. 
  4. ↑ 4.0 4.1 Fouesneau, M.; Andrae, R.; Dharmawardena, T.; Rybizki, J.; Bailer-Jones, C. A. L.; Demleitner, M. (2022). "Astrophysical parameters from Gaia DR2, 2MASS, and AllWISE". Astronomy and Astrophysics 662: A125. doi:10.1051/0004-6361/202141828. Bibcode: 2022A&A...662A.125F. 
  5. ↑ 5.0 5.1 5.2 Hon, Marc; Huber, Daniel; Kuszlewicz, James S.; Stello, Dennis; Sharma, Sanjib; Tayar, Jamie; Zinn, Joel C.; Vrard, Mathieu et al. (2021). "A "Quick Look" at All-sky Galactic Archeology with TESS: 158,000 Oscillating Red Giants from the MIT Quick-look Pipeline". The Astrophysical Journal 919 (2): 131. doi:10.3847/1538-4357/ac14b1. Bibcode: 2021ApJ...919..131H. 
  6. ↑ "BDS+258". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BDS%2B258. 



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