HD 174474

HD 174474
Location of HD 174474 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 53m 02.34680s[1]
Declination −48° 21′ 39.2965″[1]
Apparent magnitude (V) 6.17±0.01[2]
Characteristics
Spectral type A2 V[3]
U−B color index +0.08[4]
B−V color index +0.14[4]
Astrometry
Radial velocity (Rv)−44±4[5] km/s
Proper motion (μ) RA: −17.178 mas/yr[1]
Dec.: −77.772 mas/yr[1]
Parallax (π)13.3771 ± 0.0444 mas[1]
Distance243.8 ± 0.8 ly
(74.8 ± 0.2 pc)
Absolute magnitude (MV)+1.61[6]
Details
Mass2.05±0.04[7] M☉
Radius1.89±0.10[8] R☉
Luminosity18.14[9] L☉
Surface gravity (log g)4.21+0.09
−0.06[10] cgs
Temperature8664±295[11] K
Metallicity [Fe/H]−0.11[12] dex
Age630[11] Myr
Other designations
35 G. Telescopii[13], CD−48°12769, CPD−48°9971, GC 25872, HD 174474, HIP 92676, HR 7095, SAO 229342[14]
Database references
SIMBADdata

HD 174474, also designated as HR 7095 or rarely 35 G. Telescopii, is a solitary white-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.17,[2] placing it near the limit for naked eye visibility. The object is located relatively close at a distance of 244 light years based on Gaia DR3 parallax measurements[1] but is drifting closer with a heliocentric radial velocity of −44 km/s.[5] At its current distance, HD 174474's brightness is diminished by 0.26 magnitudes due to interstellar dust.[15] It has an absolute magnitude of +1.61.[6]

This is an ordinary A-type main-sequence star with a stellar classification of A2 V.[3] It has double the mass of the Sun and 1.89 times the Sun's radius.[8] It radiates 18.1 times the luminosity of the Sun from its photosphere at an effective temperature of 8,664 K.[11] HD 174474 is slightly metal deficient with an iron abundance 22% below solar levels ([Fe/H] = −0.11). It is estimated to be 630 million years old based on stellar evolution models from David & Hillenbrand (2015).[11]

  1. ^ a b c d e 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 Cite error: The named reference Przybylski1965 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. ^ Cite error: The named reference AP1999 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 McDonald2012 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  11. ^ a b c d Cite error: The named reference David2015 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Anders2019 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).