HD 46588
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 06h 46m 14.1500s |
| Declination | +79° 33′ 53.3185″ |
| Apparent magnitude (V) | +5.44 |
| Characteristics | |
| Spectral type | F7 V |
| U−B color index | −0.02 |
| B−V color index | +0.53 |
| Astrometry | |
| Radial velocity (Rv) | 15.2±0.2 km/s |
| Proper motion (μ) | RA: −99.163 mas/yr Dec.: −604.042 mas/yr |
| Parallax (π) | 54.9380±0.0595 mas |
| Distance | 59.37 ± 0.06 ly (18.20 ± 0.02 pc) |
| Absolute magnitude (MV) | +4.18 |
| Details | |
| Mass | 1.13+0.03 −0.02 M☉ |
| Radius | 1.19 R☉ |
| Luminosity | 1.82 L☉ |
| Surface gravity (log g) | 4.40±0.02 cgs |
| Temperature | 6,273±91 K |
| Metallicity [Fe/H] | −0.12±0.06 dex |
| Rotational velocity (v sin i) | 6.63 km/s |
| Age | 1.27+1.65 −0.22 Gyr |
| Other designations | |
| 23 H. Camelopardalis, AG+79°200, BD+79°212, GC 8711, GJ 240.1, HD 46588, HIP 32439, HR 2401, SAO 5946, WDS J06462+7934A | |
| Database references | |
| SIMBAD | data |
HD 46588 (HR 2401; Gliese 240.1) is a star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.44, allowing it to be faintly seen with the naked eye. The object is relatively close at a distance of only 59 light years but is receding with a heliocentric radial velocity of 15 km/s.
HD 46588 is an ordinary F-type main-sequence star with a spectral classification of F7 V. It has 113% the mass of the Sun and 119% its radius. It shines at 182% the luminosity of the Sun from its photosphere at an effective temperature of 6,273 K, giving it a yellow white glow. Isochronic measurements place HD 46588's age at 1.27 billion years, but it's poorly constrained. The star's metallicity is 76% that of the Sun and spins modestly with a projected rotational velocity of 6.63 km/s.
Due to the star's close proximity to Earth and similarity to the Sun, it has been well studied by astronomers. No planets have been found, but a brown dwarf companion was discovered in a WISE survey in 2011. It has a mass of 67.04+8.38
−19.90 Jupiter masses and a temperature of 1360+50
−80 K. An infrared excess has been discovered around HD 46588, indicating a cold debris disk with a temperature of 60 K.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| dust disk | 26.34 AU | — | — | |||