HD 131425

HD 131425
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Apus
Right ascension 15h 00m 11.3018s[1]
Declination −77° 09′ 37.9863″[1]
Apparent magnitude (V) 5.92±0.01[2]
Characteristics
Spectral type G8 II[3]
U−B color index +0.81[4]
B−V color index +1.05[4]
Astrometry
Radial velocity (Rv)1.9±0.4[5] km/s
Proper motion (μ) RA: −13.997[1] mas/yr
Dec.: −10.915[1] mas/yr
Parallax (π)3.5348 ± 0.0272 mas[1]
Distance923 ± 7 ly
(283 ± 2 pc)
Absolute magnitude (MV)−0.91[6]
Details
Mass3.13±0.58[7] M☉
Radius22.69[8] R☉
Luminosity295[6] L☉
Temperature4,750[7] K
Metallicity [Fe/H]−0.3[9] dex
Rotational velocity (v sin i)9.1±2[10] km/s
Other designations
19 G. Apodis, CPD−76°931, GC 20104, HD 131425, HIP 73415, HR 5547, SAO 257218
Database references
SIMBADdata

HD 131425 (HR 5547) is a solitary star in the southern circumpolar constellation Apus. It has an apparent magnitude of 5.92,[2] allowing it to be seen with the naked eye under ideal conditions. Located 923 light years away,[1] it is receding with a heliocentric radial velocity of 1.9 km/s.[5]

HD 131425 has a stellar classification of G8 II, indicating that it is an ageing G-type bright giant.[3] At present it has 3.13 times the mass of the Sun[7] and an enlarged diameter of 22.69 R☉.[8] It shines at 295 times the luminosity of the Sun[6] from its photosphere at an effective temperature of 4,750 K,[7] giving it an orange yellow glow. HD 131425 has an iron abundance only half of the Sun[9] and spins with a projected rotational velocity of 9.1 km/s,[10] unusually high for giants.

  1. ^ a b c d e f 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 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 c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference McDonald2017 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. ^ a b Cite error: The named reference DeMederios2014 was invoked but never defined (see the help page).