M Centauri

M Centauri
	Location of M Centauri (circled in red)
Observation data; Epoch J2000.0 Equinox ICRS
Constellation	Centaurus
Right ascension	13h 46m 39.378s
Declination	−51° 25′ 57.95″
Apparent magnitude (V)	+4.63
Characteristics
Spectral type	G8/K0III
B−V color index	+0.955
Astrometry
Radial velocity (Rv)	−15.97±2.25 km/s
Proper motion (μ)	RA: +10.00(42) mas/yr ; Dec.: −27.62(34) mas/yr
Parallax (π)	12.42±0.48 mas
Distance	260 ± 10 ly ; (81 ± 3 pc)
Absolute magnitude (MV)	+0.11
Orbit
Primary	M Centauri A
Name	M Centauri B
Period (P)	437 days
Semi-major axis (a)	6.45 mas
Eccentricity (e)	0.13
Inclination (i)	48.2°
Longitude of the node (Ω)	280.3°
Periastron epoch (T)	2424163.0
Argument of periastron (ω); (secondary)	58.6°
Other designations
	M Cen, CD−50°8017, GC 18607, HD 119834, HIP 67234, HR 5172, SAO 241157, CCDM J13467-5126A
Database references
SIMBAD	data

M Centauri (M Cen) is a binary star in the constellation Centaurus. It is approximately 260 light-years from Earth.

M Centauri is a yellow G-type giant with an apparent magnitude of +4.64. It is a spectroscopic binary with an orbital period of 437 days.

This star appears next to the globular cluster NGC 5286 in the sky.^[7]

References

1 2 3 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. XHIP record for this object at VizieR.
1 2 3 4 5 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. S2CID 18759600. Vizier catalog entry
↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
↑ Houk, Nancy (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". Ann Arbor: Dept. Of Astronomy. Bibcode:1978mcts.book.....H.
↑ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
↑ Jancart, S. (2005). "Astrometric orbits of S_B⁹ stars". Astronomy and Astrophysics. 442 (1): 365–380. arXiv:astro-ph/0507695. Bibcode:2005A&A...442..365J. doi:10.1051/0004-6361:20053003. S2CID 15123997.
1 2 "* M Cen". SIMBAD. Centre de données astronomiques de Strasbourg.

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Observation data Epoch J2000.0 Equinox ICRS
Location of M Centauri (circled in red)
Constellation	Centaurus^[1]
Right ascension	13^h 46^m 39.378^s^[2]
Declination	−51° 25′ 57.95″^[2]
Apparent magnitude (V)	+4.63^[3]
Characteristics
Spectral type	G8/K0III^[4]
B−V color index	+0.955^[1]
Astrometry
Radial velocity (R_v)	−15.97±2.25^[5] km/s
Proper motion (μ)	RA: +10.00(42)^[2] mas/yr Dec.: −27.62(34)^[2] mas/yr
Parallax (π)	12.42±0.48 mas^[2]
Distance	260 ± 10 ly (81 ± 3 pc)
Absolute magnitude (M_V)	+0.11^[1]
Orbit^[6]
Primary	M Centauri A
Name	M Centauri B
Period (P)	437 days
Semi-major axis (a)	6.45 mas
Eccentricity (e)	0.13
Inclination (i)	48.2°
Longitude of the node (Ω)	280.3°
Periastron epoch (T)	2424163.0
Argument of periastron (ω) (secondary)	58.6°
Other designations
M Cen, CD−50°8017, GC 18607, HD 119834, HIP 67234, HR 5172, SAO 241157, CCDM J13467-5126A^[7]
Database references
SIMBAD	data