HD 101581
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 41m 02.46847s |
| Declination | −44° 24′ 18.6867″ |
| Apparent magnitude (V) | 7.762 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | K4.5Vk: |
| Astrometry | |
| Radial velocity (Rv) | 13.55±0.13 km/s |
| Proper motion (μ) | RA: −660.634 mas/yr Dec.: 242.096 mas/yr |
| Parallax (π) | 78.2268±0.0182 mas |
| Distance | 41.694 ± 0.010 ly (12.783 ± 0.003 pc) |
| Absolute magnitude (MV) | +7.30 |
| Details | |
| Mass | 0.653±0.028 M☉ |
| Radius | 0.630±0.027 R☉ |
| Luminosity (bolometric) | 0.18332±0.00059 L☉ |
| Surface gravity (log g) | 4.654±0.057 cgs |
| Temperature | 4675±53 K |
| Metallicity [Fe/H] | −0.505±0.027 dex |
| Rotation | ~30 days |
| Rotational velocity (v sin i) | 2.47±0.30 km/s |
| Age | 6.88±4.27 Gyr |
| Other designations | |
| CD−43 7228, GJ 435, HD 101581, HIP 56998, SAO 222956, LHS 2441, TOI-6276, TIC 397362481 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 101581 (TOI-6276, Gliese 435) is a nearby K-type main-sequence star located in the constellation Centaurus, approximately 41.7 light-years (12.8 parsecs) away, based on a parallax of 78.227 mas. At an apparent magnitude of 7.8, it is too faint to be seen with the naked eye, although it can be viewed with a small telescope.
HD 101581 has a spectral type of K5V, which classifies it as a main sequence star (similar to the Sun) having the core hydrogen converted into helium. It has 0.65 times the Solar mass and 0.63 times the Solar radius while its age is estimated to be about 6.9 billion years old. Its surface has an effective temperature of 4633 K giving it the typical orange hue of a K-type star. The metallicity index of it is −0.344±0.059, indicating an iron-to-hydrogen ratio 45% that of the Sun.