HD 128294
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| 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 | |
| 12 G. Apodis[8], CD−76°655, CPD−76°848, GC 19736, HD 128294, HIP 71870, SAO 257182[9] | |
| 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.
