HD 174500

HD 174500
Location of HD 174500 and HD 174387 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Telescopium
Right ascension 18h 52m 59.90009s[1]
Declination −46° 35′ 10.7923″[1]
Apparent magnitude (V) 6.16±0.01[2]
Characteristics
Evolutionary stage subgiant[3]
Spectral type A1 IV/V[4]
U−B color index +0.05[5]
B−V color index +0.04[5]
Astrometry
Radial velocity (Rv)35.1±1.7[6] km/s
Proper motion (μ) RA: +3.439 mas/yr[1]
Dec.: +10.006 mas/yr[1]
Parallax (π)4.7156 ± 0.035 mas[1]
Distance692 ± 5 ly
(212 ± 2 pc)
Absolute magnitude (MV)−0.82[7]
Details
Mass3.00±0.09[1] M☉
Radius5.05±0.26[8] R☉
Luminosity273+57
−47[3] L☉
Surface gravity (log g)3.47+0.08
−0.05[9] cgs
Temperature9,594+134
−132[3] K
Metallicity [Fe/H]+0.02[10] dex
Rotational velocity (v sin i)214[11] km/s
Age370[12] Myr
Other designations
34 G. Telescopii[13], CD−46°12676, CPD−46°9517, GC 25873, HD 174500, HIP 92669, HR 7097, SAO 229343[14]
Database references
SIMBADdata

HD 174500, also designated as HR 7097 or rarely 34 G. Telescopii, is a solitary white-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.16,[2] placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place the object 692 light years away,[1] and it is currently receding with a heliocentric radial velocity of 35 km/s.[6] At its current distance, HD 174500's brightness is diminished by 0.39 magnitudes due to interstellar dust.[15] It has an absolute magnitude of −0.82.[7]

HD 174500 has a stellar classification of A1 IV/V,[4] indicating that it is an evolved A-type star with the blended luminosity class of a subgiant and a main sequence star. It has 3 times the mass of the Sun[1] and an enlarged radius of 5.05 R☉.[8] It radiates 273 times the luminosity of the Sun from its photosphere at an effective temperature of 9,594 K.[3] At the age of 370 million years HD 174500 is currently on the subgiant track and is 1.8% past its main sequence lifetime.[3] Like many hot stars it spins rapidly, having a projected rotational velocity of 214 km/s.[11] It has a solar metallicity with [Fe/H] = +0.02.[10]

This object is located close to the 5th magnitude star HD 174387. However, they do not form a double star.

  1. ^ a b c d e f g 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 c d e 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. ^ a b Cite error: The named reference Alexander1972 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Kharchenko2007 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Anders2022 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).