en HD 125628

HD 125628
Observation data; Epoch J2000 Equinox J2000
Constellation	Centaurus
Right ascension	14h 22m 37.07301s
Declination	−58° 27′ 32.8193″
Apparent magnitude (V)	4.76 (5.09 + 6.94)
Characteristics
Spectral type	G9III + F5V
B−V color index	0.795±0.003/0.45
Astrometry
Radial velocity (Rv)	+14.6±2.8 km/s
Proper motion (μ)	RA: −43.66±0.90 mas/yr ; Dec.: +17.22±0.76 mas/yr
Parallax (π)	8.51 ± 1.11 mas
Distance	approx. 380 ly ; (approx. 120 pc)
Absolute magnitude (MV)	−0.55
Details
A
Rotational velocity (v sin i)	5.5 km/s
Age	3.6 Gyr
B
Rotational velocity (v sin i)	6.3 km/s
Other designations
	CPD−57°6619, HD 125628, HIP 70264, HR 5371, SAO 241673
Database references
SIMBAD	data

HD 125628 is a binary star^[3] system in the constellation Centaurus. It is faintly visible to the naked eye with a combined apparent visual magnitude of 4.76.^[2] The distance to this system is approximately 380 light years based on parallax. It is drifting further away from the Sun with a radial velocity of +15 km/s.^[2] The absolute magnitude is −0.55.^[2]

The primary component of this system, component A, is an aging giant star with a stellar classification of G9III^[3] and a visual magnitude of 5.09.^[3] The secondary companion, designated component B, is a magnitude 6.94^[3] star located at an angular separation of 9.10″ from the primary, along a position angle of 157°, as of 2016.^[6] It is an F-type main-sequence star with a class of F5V.^[3]

References

^ ^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. S2CID 18759600.
^ ^a ^b ^c ^d ^e ^f ^g 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. S2CID 119257644.
^ ^a ^b ^c ^d ^e ^f ^g Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
^ ^a ^b ^c ^d Desidera, S.; et al. (August 2006). "Spectroscopic characterization of a sample of southern visual binaries". Astronomy and Astrophysics. 454 (2): 553–558. Bibcode:2006A&A...454..553D. doi:10.1051/0004-6361:20064895.
^ "HD 125628". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-27.
^ Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.