HD 173047

HD 173047
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 45m 55.99514s[1]
Declination −50° 52′ 21.7342″[1]
Apparent magnitude (V) 6.24±0.01[2]
Characteristics
Spectral type B8/9 II[3]
B−V color index −0.080±0.006[4]
Astrometry
Radial velocity (Rv)−10.7±0.4[1] km/s
Proper motion (μ) RA: +3.697 mas/yr[1]
Dec.: −15.975 mas/yr[1]
Parallax (π)3.1031 ± 0.0499 mas[1]
Distance1,050 ± 20 ly
(322 ± 5 pc)
Absolute magnitude (MV)−1.52[4]
Details
Mass4.00±0.11[5] M☉
Radius5.54+0.15
−0.14[1] R☉
Luminosity (bolometric)692[5] L☉
Surface gravity (log g)3.43[6] cgs
Temperature11,843±156[7] K
Metallicity [Fe/H]+0.10[6] dex
Age194[8] Myr
Other designations
28 G. Telescopii[9], CD−50°12122, CPD−50°10815, GC 25645, HD 173047, HIP 92072, SAO 245693[10]
Database references
SIMBADdata

HD 173047 is a solitary, bluish-white hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.24,[2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively far at a distance of 1,050 light-years based on Gaia DR3 parallax measurements, but it is drifting closer with a heliocentric radial velocity of −10.7 km/s.[1] At its current distance, HHD 173047's brightness is heavily diminished by 0.44 magnitudes due to interstellar extinction[8] and it has an absolute magnitude of −1.52[4]

HD 173047 has a stellar classification of B8/9 II,[3] indicating that it is an evolved B-type star with the characteristics of a B8 and B9 bright giant. It has 4 times the mass of the Sun[5] and a slightly enlarged radius 5.54 times that of the Sun's.[1] It radiates a bolometric luminosity 692 times that of the Sun's[5] from its photosphere at an effective temperature of 11,843 K[7] HD 173047 is metal enriched with an iron abundance 126% that of the Sun's ([Fe/H] = +0.10)[6] and it is estimated to be 194 million years old.[8]

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR3 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 Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Anders2022 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).