HD 2942

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HD 2942
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 00h 32m 49.087s[1]
Declination +28° 16′ 48.86″[1]
Apparent magnitude (V) 6.283
Characteristics
Spectral type K0III[2]
U−B color index 0.80[2]
B−V color index 0.99[2]
Astrometry
Radial velocity (Rv) -11.16[2] km/s
Proper motion (μ) RA: -4.41 ± 0.61[1] mas/yr
Dec.: 5.80 ± 0.39[1] mas/yr
Parallax (π) 6.31 ± 0.54[1] mas
Distance 520 ± 40 ly
(160 ± 10 pc)
Absolute magnitude (MV) 7.235
Other designations
HIP 2583, HR 134, BD+27° 84, SAO 74090.
Database references
SIMBAD data
Database references
SIMBAD data

HD 2942 is a triple star system[3] in the constellation Andromeda located approximately 158 parsecs (520 ly) away. The primary component, a red giant of spectral type K0III, has an apparent magnitude of 6.33, meaning that it is barely visible with the naked eye under good conditions.[2] The secondary and tertiary components have apparent magnitudes of 11.26[4] and 12.3,[5] respectively.

References[edit]

  1. ^ a b c d e van Leeuwen, F. (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. Vizier catalog entry
  2. ^ a b c d e "HR 134". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 February 2014. 
  3. ^ Tokovinin, A. (2008). "Comparative statistics and origin of triple and quadruple stars". Monthly Notices of the Royal Astronomical Society 389 (2): 925. doi:10.1111/j.1365-2966.2008.13613.x.  edit
  4. ^ "BD+27 84B". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 February 2014. 
  5. ^ "BD+27 84C". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 February 2014.