HD 154972

HD 154972
location of HD 154972 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Apus
Right ascension 17h 16m 35.64850s[1]
Declination −74° 31′ 58.8407″[1]
Apparent magnitude (V) 6.23±0.01[2]
Characteristics
Spectral type A0 V[3]
U−B color index +0.00[4]
B−V color index −0.01[4]
Astrometry
Radial velocity (Rv)−3.1±2[5] km/s
Proper motion (μ) RA: −23.266 mas/yr[1]
Dec.: −53.910 mas/yr[1]
Parallax (π)9.6961 ± 0.0359 mas[1]
Distance336 ± 1 ly
(103.1 ± 0.4 pc)
Absolute magnitude (MV)+1.11[6]
Details
Mass2.56+0.39
−0.29[7] M☉
Radius2.08±0.11[8] R☉
Luminosity42[1] L☉
Surface gravity (log g)4.24±0.06[7] cgs
Temperature9,772+228
−222[9] K
Metallicity [Fe/H]−0.11[10] dex
Age330±2[11] Myr
Other designations
56 G. Apodis[12], CD−74°1187, CPD−74°1610, FK5 3398, GC 23219, HD 154972, HIP 84510, HR 6373, SAO 257478[13]
Database references
SIMBADdata

HD 154972, also known as HR 6373 or rarely 56 G. Apodis, is a solitary, bluish-white-hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.23,[2] placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place the object 336 light years away,[1] and it is currently drifting closer with a heliocentric radial velocity of −3.1 km/s.[5] At its current distance, HD 154972's brightness is diminished by 0.23 magnitudes due to extinction from interstellar dust.[14] It has an absolute magnitude of +1.11.[6]

This is an ordinary A-type main-sequence star with a stellar classification of A0 V.[3] Paunzen et al. (2001) lists it as a potential λ Boötis star.[15] It has 2.56 times the mass of the Sun[7] and 2.08 times its solar radius.[8] It radiates 42 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 9,772 K.[9] It is estimated to be 330 million years old[11] and is slightly metal deficient[10] (78% solar abundance).

  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 Houk1975 was invoked but never defined (see the help page).
  4. ^ a b 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 AP1999 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 Gontcharov2012 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 Paunzen2001 was invoked but never defined (see the help page).