HD 176664

HD 176664
Location of HD 176664 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 19h 03m 57.55905s[1]
Declination −51° 01′ 06.9715″[1]
Apparent magnitude (V) 5.93±0.01[2]
Characteristics
Spectral type K0/1 III[3]
B−V color index +1.24[4]
Astrometry
Radial velocity (Rv)−60.2±0.4[5] km/s
Proper motion (μ) RA: +40.300 mas/yr[1]
Dec.: −147.992 mas/yr[1]
Parallax (π)11.1536 ± 0.0456 mas[1]
Distance292 ± 1 ly
(89.7 ± 0.4 pc)
Absolute magnitude (MV)+0.94[6]
Details
Mass1.17[7] M☉
Radius12.4±0.6[8] R☉
Luminosity49.9±0.4[1] L☉
Surface gravity (log g)2.42[7] cgs
Temperature4,546±122[9] K
Metallicity [Fe/H]+0.25[10] dex
Rotational velocity (v sin i)<1[11] km/s
Age377[1] Myr
Other designations
43 G. Telescopii[12], CD−51°11893, CPD−51°11104, HD 176664, HIP 93624, HR 7190, SAO 245899, CCDM J19040-5101A, WDS J19040-5101A[13]
Database references
SIMBADdata

HD 176664, also known as HR 7190 or rarely 43 G. Telescopii, is a solitary star located in the southern constellation Telescopium. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.93.[2] The object is located relatively close at a distance of 292 light years based on Gaia DR3 parallax measurements[1] but is rapidly approaching the Solar System with a heliocentric radial velocity of −60 km/s.[5] At its current distance HD 176664's brightness is diminished by two-tenths of a magnitude due to interstellar dust.[14] It has an absolute magnitude of +0.94.[6]

HD 176664 has a stellar classification of K0/1 III, indicating that it is an evolved K-type star with a spectrum intermediate of a K0 and K1 giant star. It has a comparable mass to the Sun[7] but it has expanded to 12.4 times its girth.[8] It radiates 49.9 times the luminosity of the Sun[1] from its enlarged photosphere at an effective temperature of 4,546 K.[9] HD 176664 is metal enriched ([Fe/H] = +0.25) and spins too slowly to be measured accurately.[11] A 1993 paper by Olin J. Eggen lists HD 176664 as a member of the Milky Way's old disk population.[10]

The star has two optical companions designated CD −51°11893B and CD −51°11893C. B is a distant 13th magnitude star located 19.4" away along a position angle of 9° while C is a 12th magnitude star located 27.5" away along a position angle of 29°.[15]

  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. ^ Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Anders2019 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. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Eggen1993 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference De Medeiros2014 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Mason2001 was invoked but never defined (see the help page).