HD 128294

HD 128294
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Apus
Right ascension 14h 41m 59.70978s[1]
Declination −77° 00′ 41.2260″[1]
Apparent magnitude (V) 6.34±0.01[2]
Characteristics
Evolutionary stage main sequence[1]
Spectral type B9 III[3]
B−V color index −0.027±0.002[4]
Astrometry
Radial velocity (Rv)8.94±2.29[1] km/s
Proper motion (μ) RA: −21.428 mas/yr[1]
Dec.: −12.249 mas/yr[1]
Parallax (π)5.2747 ± 0.0603 mas[1]
Distance618 ± 7 ly
(190 ± 2 pc)
Absolute magnitude (MV)+0.07[4]
Details
Mass2.66+0.47
−0.25[5] M☉
Radius3.62±0.11[5] R☉
Luminosity145+20
−31[1] L☉
Surface gravity (log g)3.75+0.09
−0.04[5] cgs
Temperature10,336+158
−296[5] K
Metallicity [Fe/H]−0.09[6] dex
Age286[7] Myr
Other designations
12 G. Apodis[8], CD−76°655, CPD−76°848, GC 19736, HD 128294, HIP 71870, SAO 257182[9]
Database references
SIMBADdata

HD 128294 is a solitary, bluish-white hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.34,[2] placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 618 light-years.[1] At its current distance, HD 128294's brightness is heavily diminished by 0.43 magnitudes due to interstellar extinction[10] and it has an absolute magnitude of +0.07.[4]

HD 128294 has a stellar classification of B9 III,[3] indicating that it is an evolved blue giant. At the age of 286 million years,[7] the object has completed 71.9% of its main sequence lifetime according to Gaia DR3 models.[1] It has 2.66 times the mass of the Sun and a slightly enlarged radius 3.62 times that of the Sun's.[5] It radiates 145 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 10,336 K.[5] According to astrophysical parameters based on the Gaia passband, HD 128294 has an iron abundance 81.3% that of the Sun's ([Fe/H) = −0.09),[6] making it slightly metal deficient.

  1. ^ a b c d e f g h i j 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 e f Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anders2022 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).