HD 101570
HD 101570 is a single star in the southern constellation of Centaurus. It has a yellow hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.93. The star is located at a distance of approximately 1,080 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. It has an absolute magnitude of −2.24.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 40m 53.63379s |
| Declination | −62° 05′ 24.3655″ |
| Apparent magnitude (V) | 4.93 |
| Characteristics | |
| Spectral type | G3Ib |
| B−V color index | 1.111±0.054 |
| Astrometry | |
| Radial velocity (Rv) | +18.04±0.18 km/s |
| Proper motion (μ) | RA: −15.493±0.082 mas/yr Dec.: +0.981±0.087 mas/yr |
| Parallax (π) | 3.0181 ± 0.0777 mas |
| Distance | 1,080 ± 30 ly (331 ± 9 pc) |
| Absolute magnitude (MV) | −2.24 |
| Details | |
| Mass | 17.0 M☉ |
| Radius | 61.2 R☉ |
| Luminosity | 2,168 L☉ |
| Surface gravity (log g) | 1.86 cgs |
| Temperature | 4,753 K |
| Rotational velocity (v sin i) | 21.4±2.1 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an ageing supergiant star with a stellar classification of G3Ib. Having exhausted the supply of hydrogen at its core, the star has expanded to 61 times the radius of the Sun. It has an abnormally high rate of rotation for its evolutionary state, showing a projected rotational velocity of 21.4 km/s. The star is radiating 1,641 times the luminosity of the Sun from its photosphere at an effective temperature of 4,753 K.