HD 137366

HD 137366
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Apus
Right ascension 15h 30m 49.18128s[1]
Declination −71° 39′ 14.8868″[1]
Apparent magnitude (V) 6.38±0.01[2]
Characteristics
Spectral type B3 V[3]
B−V color index −0.112±0.002[4]
Astrometry
Proper motion (μ) RA: −6.541 mas/yr[1]
Dec.: −21.027 mas/yr[1]
Parallax (π)2.976 ± 0.0439 mas[1]
Distance1,100 ± 20 ly
(336 ± 5 pc)
Absolute magnitude (MV)−1.54[4]
Details
Mass7.0±0.1[5] M☉
Radius5.6[6] R☉
Luminosity953[6] L☉
Surface gravity (log g)3.73[7] cgs
Temperature19,290[8] K
Metallicity [Fe/H]−0.17[9] dex
Rotational velocity (v sin i)8[8] km/s
Age27.7±2.5[5] Myr
Other designations
30 G. Apodis[10], CD−71°1162, CPD−71°1852, GC 20789, HD 137366, HIP 75959, SAO 257284[11]
Database references
SIMBADdata

HD 137366 is a solitary blue-hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.38,[2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively far at a distance of approximately 1,100 light-years based on Gaia DR3 parallax measurements,[1] but its heliocentric radial velocity is not known. At its current distance, HD 137366's brightness is diminished by three-tenths of a magnitudes due to interstellar extinction[12] and it has an absolute magnitude of −1.54.[4]

HD 137366 has a stellar classification of B3 V,[3] indicating that it is an ordinary B-type main-sequence star that is generating energy via hydrogen fusion at its core. It has 7 times the mass of the Sun[5] and 5.6 times the radius of the Sun.[6] It radiates 953 times the luminosity of the Sun[6] from its photosphere at an effective temperature of 19,290 K.[8] HD 137366 is metal deficient with an iron abundance 67.6% that of the Sun's ([Fe/H] = −0.17)[9] and it is estimated to be 27.7 million years old.[5] Unlike most hot stars, HD 137366 has a relatively low projected rotational velocity of only 8 km/s.[8]

  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 Houk1975 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anders2022 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Braganca2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).