HD 174387

HD 174387
Location of HD 174837 and HD 174500 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 52m 27.2298s[1]
Declination −46° 35′ 42.4326″[1]
Apparent magnitude (V) 5.49±0.01[2]
Characteristics
Spectral type M0 III[3]
B−V color index +1.63[4]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)−28.1±0.9[6] km/s
Proper motion (μ) RA: +28.229 mas/yr[1]
Dec.: −0.941 mas/yr[1]
Parallax (π)4.0175 ± 0.1091 mas[1]
Distance810 ± 20 ly
(249 ± 7 pc)
Absolute magnitude (MV)−1.97[7]
Details
Mass1.14[8] M☉
Radius82.63[9] R☉
Luminosity902[10] L☉
Surface gravity (log g)0.79[8] cgs
Temperature3929±122[11] K
Metallicity [Fe/H]−0.04[8] dex
Other designations
33 G. Telescopii, NSV 24617, CD−46°12669, CPD−46°9512, GC 25861, HD 174387, HIP 92630, HR 7092, SAO 229336[12][13]
Database references
SIMBADdata

HD 174387 (HR 7092) is a solitary[14] star in the southern constellation Telescopium. With an apparent magnitude of 5.49,[2] it is faintly visible to the naked eye if viewed under dark skies. Parallax measurements put the object at a distance of 810 light years[1] and it is currently approaching the Solar System with a heliocentric radial velocity of −28.1 km/s.[6]

HD 174387 has a stellar classification of M0 III,[3] indicating that it is an ageing red giant. Due to its evolved state, the star has expanded to a diameter of 82.63 R☉.[9] At present it has 114% the mass of the Sun[8] and shines 902 times the luminosity of the Sun[10] from its enlarged photosphere at an effective temperature of 3,929 K,[11] giving a red hue when viewed. HD 174387's metallicity is estimated to be 91% that of the Sun.[8] The star is suspected to be variable, ranging from magnitudes 5.59 to 5.63 in the Hipparcos passband.[5]

  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 Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Corben1971 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Wilson1953 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 d e Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Kervella2021 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD 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 Eggleton2008 was invoked but never defined (see the help page).