HD 167257

HD 167257
Observation data
Epoch J2000      Equinox J2000
Constellation Telescopium
Right ascension 18h 17m 00.9195s[1]
Declination –51° 04′ 05.7597″[1]
Apparent magnitude (V) 6.05±0.01[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9V[4]
B−V color index −0.06[5]
Astrometry
Radial velocity (Rv)−5.1±4.3[6] km/s
Proper motion (μ) RA: +1.260 mas/yr[1]
Dec.: −9.497 mas/yr[1]
Parallax (π)7.7579 ± 0.0512 mas[1]
Distance420 ± 3 ly
(128.9 ± 0.9 pc)
Absolute magnitude (MV)+0.64[7]
Details
Mass2.63±0.06[3] M☉
Radius2.8±0.1[8] R☉
Luminosity64.6+7.7
−8.7[3] L☉
Surface gravity (log g)3.97±0.06[8] cgs
Temperature10,139[9] K
Metallicity [Fe/H]0.00[10] dex
Rotational velocity (v sin i)61[11] km/s
Age239[10] Myr
Other designations
7 G. Telescopii, CD–51°11460, CPD−51°10795, GC 24909, HD 167257, HIP 89597, HR 6821, SAO 245372
Database references
SIMBADdata

HD 167257 (HR 6821) is a solitary star in the southern constellation Telescopium. It has an apparent magnitude of 6.05,[2] making it faintly visible to the naked eye. Parallax measurements place the star at a distance of 420 light years[1] and has a radial velocity of −5.1 km/s,[6] which is poorly constrained. This indicates that it is drifting towards the Solar System.

HD 167257 has a stellar classification of B9 V,[4] indicating that it is an ordinary B-type main-sequence star. It has 2.63 times the mass of the Sun,[3] and 2.8 times the radius of the Sun.[8] It shines with a luminosity of about 65 L☉[3] from its photosphere at an effective temperature of 10,139 K,[9] giving it a bluish white hue. HD 167257 is estimated to be about 240 million years old[10] – 58.6% through its main sequence lifetime[3] – and spins modestly with a projected rotational velocity of 61 km/s;[11] it has a solar metallicity.[10]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference TESS was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Soubiran2016 was invoked but never defined (see the help page).
  10. ^ a b c d Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Levato2004 was invoked but never defined (see the help page).