HD 29559
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Caelum[1] |
| Right ascension | 04h 37m 19.2681s[2] |
| Declination | −41° 52′ 22.5964″[2] |
| Apparent magnitude (V) | 6.40±0.01[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | A5 IV-V[5] |
| B−V color index | +0.15[3] |
| Astrometry | |
| Radial velocity (Rv) | 24.2±0.8[6] km/s |
| Proper motion (μ) | RA: +25.296 mas/yr[2] Dec.: +49.716 mas/yr[2] |
| Parallax (π) | 7.9974±0.0193 mas[2] |
| Distance | 407.8 ± 1.0 ly (125.0 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.03[1] |
| Details | |
| Mass | 2.19±0.04[4] M☉ |
| Radius | 3.17±0.08[7] R☉ |
| Luminosity | 35±3[4] L☉ |
| Surface gravity (log g) | 3.7±0.1[7] cgs |
| Temperature | 7,852±36[4] K |
| Metallicity [Fe/H] | −0.01[8] dex |
| Rotational velocity (v sin i) | 176±5[9] km/s |
| Age | 719[8] Myr |
| Other designations | |
| 8 G. Caeli, CD−42°1572, CPD−42°507, GC 5653, HD 29559, HIP 21525, SAO 216899[10][11] | |
| Database references | |
| SIMBAD | data |
HD 29559 is a solitary star in the southern constellation Caelum. It has an apparent magnitude of 6.40,[3] placing it near the max naked eye visibility. The star is situated at a distance 408 light years[2] based on parallax measurements but is receding with a heliocentric radial velocity of 24.2 km/s.[6]
HD 29559 has a stellar classification of A5 IV-V[5] — 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[4] 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,[4] 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.[4]
References
[edit | edit source]- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). XHIP record for this object at VizieR.
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (Erratum: Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).). Gaia EDR3 record for this source at VizieR.
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e f g Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
