HD 4308
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Tucana |
| Right ascension | 00h 44m 39.2675s |
| Declination | –65° 38′ 58.2825″ |
| Apparent magnitude (V) | 6.544±0.005 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G6VFe-0.9 |
| Apparent magnitude (B) | 7.193 |
| Apparent magnitude (V) | 6.552 |
| Apparent magnitude (J) | 5.366±0.024 |
| Apparent magnitude (H) | 5.101±0.016 |
| Apparent magnitude (K) | 4.945±0.020 |
| Astrometry | |
| Radial velocity (Rv) | +95.251±0.0162 km/s |
| Proper motion (μ) | RA: 157.504±0.041 mas/yr Dec.: −741.599±0.040 mas/yr |
| Parallax (π) | 45.3930±0.0220 mas |
| Distance | 71.85 ± 0.03 ly (22.03 ± 0.01 pc) |
| Details | |
| Mass | 0.95±0.05 M☉ |
| Radius | 1.04±0.03 R☉ |
| Luminosity | 1.03±0.01 L☉ |
| Surface gravity (log g) | 4.38±0.02 cgs |
| Temperature | 5,714±61 K |
| Metallicity [Fe/H] | −0.35±0.07 dex |
| Rotational velocity (v sin i) | 1.0±1.0 km/s |
| Age | 1.6±4.0 or 10.0+0.5 −1.0 Gyr |
| Other designations | |
| BD−27°223, GC 897, GJ 31.5, GJ 9028, HD 4308, HIP 3497, SAO 248244, PPM 352003, LFT 71, LHS 1139, LPM 40, LTT 416, TYC 8847-598-1, GCRV 50662, 2MASS J00443925-6538581 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
HD 4308 is a single star with an orbiting exoplanet in the southern constellation of Tucana. It has a yellow hue and is a challenge to view with the naked eye even under good seeing conditions, having an apparent visual magnitude of 6.54. This object is located at a distance of 72 light years, as determined from parallax measurements. It is a population II star and is considered to be a member of the thick disk. The star is receding from the Sun with a radial velocity of +95 km/s.
This is a Sun-like G-type main-sequence star with a stellar classification of G6VFe-0.9, where the suffix notation indicates an underabundance of iron in the spectrum. The age of the star is poorly constrained, with estimated ranging from 1.6 billion years up to 10 billion. It has 95% of the mass of the Sun but 104% of the Sun's radius. The star is radiating nearly the same luminosity as the Sun from its photosphere at an effective temperature of 5,714 K.