Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Perseus |
Right ascension | 04h 41m 36.31645s[1] |
Declination | +42° 07′ 06.4209″[1] |
Apparent magnitude (V) | 7.29[2] |
Characteristics | |
Spectral type | G2 V[3] |
B−V color index | 0.633[3] |
Astrometry | |
Radial velocity (Rv) | +112.67±0.20[1] km/s |
Proper motion (μ) | RA: +534.004[1] mas/yr Dec.: −414.768[1] mas/yr |
Parallax (π) | 36.3130 ± 0.0697 mas[1] |
Distance | 89.8 ± 0.2 ly (27.54 ± 0.05 pc) |
Absolute magnitude (MV) | 5.08[3] |
Orbit[4] | |
Period (P) | 1,474.9±10.2 d |
Eccentricity (e) | 0.713±0.006[5] |
Periastron epoch (T) | JD 2,447,763.5±45.8 |
Argument of periastron (ω) (secondary) | 80.2±13.3° |
Semi-amplitude (K1) (primary) | 1.02±0.16 km/s |
Details[3] | |
Mass | 1.033±0.010[5] M☉ |
Luminosity | 0.798+0.040 −0.038 L☉ |
Surface gravity (log g) | 4.54±0.22 cgs |
Temperature | 5,709±35 K |
Metallicity [Fe/H] | −0.51±0.05 dex |
Age | 14.7+3.8 −2.7 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
HD 29587 is a Sun-like[7] star with a candidate brown dwarf companion[8] in the northern constellation of Perseus. It has an apparent visual magnitude of 7.29,[2] which means it is too faint to be viewed with the naked eye. Based upon an annual parallax shift of 36.3 mas,[1] it is located 89.8 light years away. The star is moving away from the Earth with a heliocentric radial velocity of +113 km/s,[1] having come to within 55.8 ly some 148,000 years ago.[2] It is a hyper-velocity halo[7] star moving at a rate of 170 km/s relative to the local standard of rest.[9]
This ancient star has a stellar classification of G2 V,[3] matching a G-type main-sequence star. It has 78% of the mass of the Sun and is radiating 80% of the Sun's luminosity from its photosphere at an effective temperature of 5,709 K.[3]
GaiaDR2
was invoked but never defined (see the help page).Anderson2012
was invoked but never defined (see the help page).DaSilva2015
was invoked but never defined (see the help page).Halbwachs2000
was invoked but never defined (see the help page).SIMBAD
was invoked but never defined (see the help page).Fossati2015
was invoked but never defined (see the help page).Mazeh1996
was invoked but never defined (see the help page).Hobbs1987
was invoked but never defined (see the help page).