HD 29559
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Caelum |
| Right ascension | 04h 37m 19.2681s |
| Declination | −41° 52′ 22.5964″ |
| Apparent magnitude (V) | 6.40±0.01 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A5 IV-V |
| B−V color index | +0.15 |
| Astrometry | |
| Radial velocity (Rv) | 24.2±0.8 km/s |
| Proper motion (μ) | RA: +25.296 mas/yr Dec.: +49.716 mas/yr |
| Parallax (π) | 7.9974±0.0193 mas |
| Distance | 407.8 ± 1.0 ly (125.0 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.03 |
| Details | |
| Mass | 2.19±0.04 M☉ |
| Radius | 3.17±0.08 R☉ |
| Luminosity | 35±3 L☉ |
| Surface gravity (log g) | 3.7±0.1 cgs |
| Temperature | 7,852±36 K |
| Metallicity [Fe/H] | −0.01 dex |
| Rotational velocity (v sin i) | 176±5 km/s |
| Age | 719 Myr |
| Other designations | |
| 8 G. Caeli, CD−42°1572, CPD−42°507, GC 5653, HD 29559, HIP 21525, SAO 216899 | |
| Database references | |
| SIMBAD | data |
HD 29559 is a solitary star in the southern constellation Caelum. It has an apparent magnitude of 6.40, placing it near the max naked eye visibility. The star is situated at a distance 408 light years based on parallax measurements but is receding with a heliocentric radial velocity of 24.2 km/s.
HD 29559 has a stellar classification of A5 IV-V — a luminosity class intermediate between a main sequence star and subgiant. It has alternatively been classified as A3 Vs:, indicating that it is an A-type main-sequence star with sharp (narrow) absorption lines due to slow rotation. However, there is uncertainty behind the class.
It has 2.19 times the mass of the Sun and a slightly enlarged diameter of 3.17 R☉. It radiates at 35 times the luminosity of the Sun from its photosphere at an effective temperature of 7,852 K, which gives it a white hue. Contrary to the second classification, HD 29559 spins rapidly with a projected rotational velocity of 176 km/s and has a solar metallicity. It is estimated to be 719 million years old, having completed 85.9% of its main sequence lifetime.