| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 11h 40m 53.63379s[2] |
| Declination | −62° 05′ 24.3655″[2] |
| Apparent magnitude (V) | 4.93[1] |
| Characteristics | |
| Spectral type | G3Ib[3] |
| B−Vcolor index | 1.111±0.054[1] |
| Astrometry | |
| Radial velocity (Rv) | +18.04±0.18[2] km/s |
| Proper motion (μ) | RA: −15.493±0.082[2]mas/yr Dec.: +0.981±0.087[2]mas/yr |
| Parallax (π) | 3.0181±0.0777 mas[2] |
| Distance | 1,080 ± 30 ly (331 ± 9 pc) |
| Absolute magnitude (MV) | −2.24[1] |
| Details | |
| Mass | 17.0[4] M☉ |
| Radius | 61.2[5] R☉ |
| Luminosity | 2,168[4] L☉ |
| Surface gravity (log g) | 1.86[4] cgs |
| Temperature | 4,753[5] K |
| Rotational velocity (v sin i) | 21.4±2.1[6] km/s |
| Other designations | |
| CD−61°3145,GC 16037,HD 101570,HIP 56986,HR 4499,SAO 251535[7] | |
| Database references | |
| SIMBAD | data |
HD 101570 is a single[8]star in the southernconstellation ofCentaurus. It has a yellow hue and is faintly visible to the naked eye with anapparent visual magnitude of 4.93. The star is located at a distance of approximately 1,080 light years from theSun based onparallax, and is drifting further away with aradial velocity of +18 km/s. It has anabsolute magnitude of −2.24.
This is an ageingsupergiant star with astellar classification of G3Ib.[3] Having exhausted the supply of hydrogen at itscore, the star has expanded to 61 times theradius of the Sun. It has an abnormally high rate of rotation for its evolutionary state, showing aprojected rotational velocity of 21.4 km/s.[9] The star is radiating 1,641 times theluminosity of the Sun from itsphotosphere at aneffective temperature of 4,753 K.
