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] |
Distance | 618 ± 7 ly (190 ± 2 pc) |
Absolute magnitude (MV) | +0.07[4] |
Details | |
Mass | 2.66+0.47 −0.25[5] M☉ |
Radius | 3.62±0.11[5] R☉ |
Luminosity | 145+20 −31[1] L☉ |
Surface gravity (log g) | 3.75+0.09 −0.04[5] cgs |
Temperature | 10,336+158 −296[5] K |
Metallicity [Fe/H] | −0.09[6] dex |
Age | 286[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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.