HD 125628
HD 125628 is a binary star system in the constellation Centaurus. It is faintly visible to the naked eye with a combined apparent visual magnitude of 4.76. 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. The absolute magnitude is −0.55.
| 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 | |
| Database references | |
| SIMBAD | data |
The primary component of this system, component A, is an aging giant star with a stellar classification of G9III and a visual magnitude of 5.09. The secondary companion, designated component B, is a magnitude 6.94 star located at an angular separation of 9.10″ from the primary, along a position angle of 157°, as of 2016. It is an F-type main-sequence star with a class of F5V.
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