HD 125072
Star in the constellation Centaurus
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HD 125072 is a star in the southern constellation of Centaurus. It is a challenge to view with the naked eye, having an apparent visual magnitude of 6.637.[2] The star is located at a distance of 38.6 light years from the Sun based on parallax.[1] It is drifting closer with a radial velocity of −14.9 km/s.[5] The components of the space velocity for this star are U=−18.5, V=−6.9 and W=−26.9 km/s.[7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 14h 19m 04.83414s[1] |
| Declination | −59° 22′ 44.5272″[1] |
| Apparent magnitude (V) | 6.637[2] |
| Characteristics | |
| Spectral type | K3 IV[3] |
| U−B color index | +0.905[4] |
| B−V color index | +1.025[4] |
| Astrometry | |
| Radial velocity (Rv) | −14.9[5] km/s |
| Proper motion (μ) | RA: −454.895[1] mas/yr Dec.: −810.729[1] mas/yr |
| Parallax (π) | 84.4535±0.0349 mas[1] |
| Distance | 38.62 ± 0.02 ly (11.841 ± 0.005 pc) |
| Absolute magnitude (MV) | 6.28[2] |
| Details | |
| Mass | 0.806±0.017[6] M☉ |
| Radius | 0.83+0.02 −0.01[1] R☉ |
| Luminosity | 0.347±0.001[1] L☉ |
| Surface gravity (log g) | 4.48[3] cgs |
| Temperature | 4,858+47 −59[1] K |
| Metallicity [Fe/H] | −0.70[7] dex |
| Rotational velocity (v sin i) | 3.97[8] km/s |
| Age | 9.98[7] Gyr |
| Other designations | |
| CD−58°5564, GJ 542, HD 125072, HIP 69972, SAO 241627, LHS 2892, LTT 5625[9] | |
| Database references | |
| SIMBAD | data |
The stellar classification of this star is K3 IV,[3] matching a K-type subgiant that is evolving into a giant. It has 81%[6] of the Sun's mass and 83%[1] of the radius of the Sun. The star is radiating 34.7% of the Sun's luminosity from its photosphere at an effective temperature of 4,858 K.[1] Based on the composition and kinematics of this star, it has an estimated age of about 10 billion years.[7] It is spinning with a projected rotational velocity of 4 km/s.[8]