HD 2942

HD 2942

Observation data Epoch J2000      Equinox J2000
Constellation	Andromeda
Right ascension	00^h 32^m 49.087^s[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

1. 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. "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. arXiv:0806.3263. Bibcode:2008MNRAS.389..925T. doi:10.1111/j.1365-2966.2008.13613.x.
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.

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