Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Caelum |
Right ascension | 04h 37m 19.2681s[1] |
Declination | −41° 52′ 22.5964″[1] |
Apparent magnitude (V) | 6.40±0.01[2] |
Characteristics | |
Evolutionary stage | main sequence[3] |
Spectral type | A5 IV-V[4] |
B−V color index | +0.15[2] |
Astrometry | |
Radial velocity (Rv) | 24.2±0.8[5] km/s |
Proper motion (μ) | RA: +25.296 mas/yr[1] Dec.: +49.716 mas/yr[1] |
Parallax (π) | 7.9974 ± 0.0193 mas[1] |
Distance | 407.8 ± 1.0 ly (125.0 ± 0.3 pc) |
Absolute magnitude (MV) | +1.03[6] |
Details | |
Mass | 2.19±0.04[3] M☉ |
Radius | 3.17±0.08[7] R☉ |
Luminosity | 35±3[3] L☉ |
Surface gravity (log g) | 3.7±0.1[7] cgs |
Temperature | 7,852±36[3] K |
Metallicity [Fe/H] | −0.01[8] dex |
Rotational velocity (v sin i) | 176±5[9] km/s |
Age | 719[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
HD 29559 is a solitary star in the southern constellation Caelum. It has an apparent magnitude of 6.40,[2] placing it near the max naked eye visibility. The star is situated at a distance 408 light years[1] based on parallax measurements but is receding with a heliocentric radial velocity of 24.2 km/s.[5]
HD 29559 has a stellar classification of A5 IV-V[4] — a luminosity class intermediate between a main sequence star and subgiant. It has alternatively been classified as A3 Vs:,[12] 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[3] and a slightly enlarged diameter of 3.17 R☉.[7] It radiates at 35 times the luminosity of the Sun from its photosphere at an effective temperature of 7,852 K,[3] which gives it a white hue. Contrary to the second classification, HD 29559 spins rapidly with a projected rotational velocity of 176 km/s[9] and has a solar metallicity.[8] It is estimated to be 719 million years old,[8] having completed 85.9% of its main sequence lifetime.[3]