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HD 176425

HD 176425
Location of HD 176425 (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Australis
Right ascension 19h 02m 08.52100s[1]
Declination −41° 54′ 37.8260″[1]
Apparent magnitude (V) 6.21±0.01[2]
Characteristics
Spectral type A0 V[3]
B−V color index 0.00[4]
Astrometry
Radial velocity (Rv)−12.8±4.3[5] km/s
Proper motion (μ) RA: +30.557 mas/yr[1]
Dec.: −11.271 mas/yr[1]
Parallax (π)9.1110 ± 0.0417 mas[1]
Distance358 ± 2 ly
(109.8 ± 0.5 pc)
Absolute magnitude (MV)+0.75[6]
Details
Mass2.63+0.38
−0.30[7] M☉
Radius2.19±0.11[8] R☉
Luminosity50.8+0.6
−0.7[1] L☉
Surface gravity (log g)4.23+0.05
−0.07[7] cgs
Temperature10,163[9] K
Metallicity [Fe/H]−0.10[10] dex
Age286±7[11][12] Myr
Other designations
38 G. Coronae Australis[13], CD−42°13839, CPD−42°8564, GC 26164, HD 176425, HIP 93470, HR 7177, SAO 229446[14]
Database references
SIMBADdata

HD 176425, also known as HR 7177 or rarely 38 G. Coronae Australis, is a solitary, bluish-white hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 6.21,[2] placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 358 light-years,[1] and it is currently drifting closer with a heliocentric radial velocity of −12.8 km/s.[5] At its current distance, HD 176425's brightness is diminished by an interstellar extinction factor of 0.27 magnitudes[15] and it has an absolute magnitude of +0.75.[6]

HD 176425 is an ordinary A-type main-sequence star with a stellar classification of A0 V.[3] It has been used as an unpolarized standard in the southern sky.[16] It has 2.63 times the mass of the Sun[7] and 2.19 times the radius of the Sun.[8] The object radiates 50.8 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 10,163 K.[9] HD 176425 is metal deficient with an iron abundance 79% that of the Sun ([Fe/H] = −0.10)[10] and it is estimated to be 286 million years old.[11][12]

  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 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 Stassun2019 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 Westin1985 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 Gontcharov2012A was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Gontcharov2012B 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).
  16. ^ Cite error: The named reference Gil-Hutton2003 was invoked but never defined (see the help page).

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