Astronomy:HD 125628
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 22m 37.07301s[1] |
| Declination | −58° 27′ 32.8193″[1] |
| Apparent magnitude (V) | 4.76[2] (5.09 + 6.94)[3] |
| Characteristics | |
| Spectral type | G9III + F5V[3] |
| B−V color index | 0.795±0.003[2]/0.45[4] |
| Astrometry | |
| Radial velocity (Rv) | +14.6±2.8[2] km/s |
| Proper motion (μ) | RA: −43.66±0.90[1] mas/yr Dec.: +17.22±0.76[1] mas/yr |
| Parallax (π) | 8.51 ± 1.11[1] mas |
| Distance | approx. 380 ly (approx. 120 pc) |
| Absolute magnitude (MV) | −0.55[2] |
| Details | |
| A | |
| Rotational velocity (v sin i) | 5.5[4] km/s |
| Age | 3.6[4] Gyr |
| B | |
| Rotational velocity (v sin i) | 6.3[4] km/s |
| Other designations | |
| 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
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E.
- ↑ 4.0 4.1 4.2 4.3 Desidera, S. et al. (August 2006). "Spectroscopic characterization of a sample of southern visual binaries". Astronomy and Astrophysics 454 (2): 553–558. doi:10.1051/0004-6361:20064895. Bibcode: 2006A&A...454..553D.
- ↑ "HD 125628". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+125628.
- ↑ Mason, B. D. et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal 122 (6): 3466–3471. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.
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