Global InformationHD 59640 information
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Volans |
| Right ascension | 07h 24m 37.12530s[1] |
| Declination | −71° 28′ 14.3716″[1] |
| Apparent magnitude (V) | 6.48±0.01[2] |
| Characteristics | |
| Spectral type | A3 V[3] |
| U−B color index | +0.08[4] |
| B−V color index | +0.12[4] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | 18.4±0.4[1] km/s |
| Proper motion (μ) | RA: +7.272 mas/yr[1] Dec.: +42.576 mas/yr[1] |
| Parallax (π) | 12.4367 ± 0.0357 mas[1] |
| Distance | 262.3 ± 0.8 ly (80.4 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.91[6] |
| Details | |
| Mass | 1.82±0.07[7] M☉ |
| Radius | 1.77±0.09[8] R☉ |
| Luminosity | 13.67[9] L☉ |
| Surface gravity (log g) | 4.28±0.07[10] cgs |
| Temperature | 8,466±125[10] K |
| Metallicity [Fe/H] | −0.20[11] dex |
| Rotation | 42.9 min[5] |
| Other designations | |
11 G. Volantis[12], CD−71°402, CPD−71°574, GC 9967, HD 59640, HIP 35946, SAO 256408[13] | |
| Database references | |
| SIMBAD | data |
HD 59640 is a solitary white hued star located in the southern circumpolar constellation Volans. It has an apparent magnitude of 6.48,[2] placing it near the limit for naked eye visibility. Gaia DR3 parallax measurements place the object at a distance of 262 light years[1] and it is receding with a heliocentric radial velocity of 18.4 km/s.[1] At its current distance, HD 59640's brightness is diminished by three tenths of a magnitude due to interstellar dust.[14]
This is an ordinary A-type main-sequence star with a stellar classification of A3 V. It has 1.82 times the mass of the Sun[7] and 1.77 times its radius.[8] It radiates 13.7 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 8,466 K.[10] HD 59640 has an iron abundance 63% that of the Sun,[11] making it metal deficient. In 2020, Maximillian N. Günther and colleagues found the object to be an eruptive variable star with flares lasting up to 10 minutes. However, they are rather small, with the maximum being only two hundredths of a magnitude.[5]
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