HD 167257
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 17m 00.9195s |
| Declination | –51° 04′ 05.7597″ |
| Apparent magnitude (V) | 6.05±0.01 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | B9V |
| B−V color index | −0.06 |
| Astrometry | |
| Radial velocity (Rv) | −5.1±4.3 km/s |
| Proper motion (μ) | RA: +1.260 mas/yr Dec.: −9.497 mas/yr |
| Parallax (π) | 7.7579±0.0512 mas |
| Distance | 420 ± 3 ly (128.9 ± 0.9 pc) |
| Absolute magnitude (MV) | +0.64 |
| Details | |
| Mass | 2.63±0.06 M☉ |
| Radius | 2.8±0.1 R☉ |
| Luminosity | 64.6+7.7 −8.7 L☉ |
| Surface gravity (log g) | 3.97±0.06 cgs |
| Temperature | 10,139 K |
| Metallicity [Fe/H] | 0.00 dex |
| Rotational velocity (v sin i) | 61 km/s |
| Age | 239 Myr |
| Other designations | |
| 7 G. Telescopii, CD–51°11460, CPD−51°10795, GC 24909, HD 167257, HIP 89597, HR 6821, SAO 245372 | |
| Database references | |
| SIMBAD | data |
HD 167257 (HR 6821) is a solitary star in the southern constellation Telescopium. It has an apparent magnitude of 6.05, making it faintly visible to the naked eye. Parallax measurements place the star at a distance of 420 light years and has a radial velocity of −5.1 km/s, which is poorly constrained. This indicates that it is drifting towards the Solar System.
HD 167257 has a stellar classification of B9 V, indicating that it is an ordinary B-type main-sequence star. It has 2.63 times the mass of the Sun, and 2.8 times the radius of the Sun. It shines with a luminosity of about 65 L☉ from its photosphere at an effective temperature of 10,139 K, giving it a bluish white hue. HD 167257 is estimated to be about 240 million years old – 58.6% through its main sequence lifetime – and spins modestly with a projected rotational velocity of 61 km/s; it has a solar metallicity.