HIP 5158
Coordinates: 
01h 06m 02.0482s, −22° 27′ 11.350″
01h 06m 02.0482s, −22° 27′ 11.350″| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus[1]
|
| Right ascension | 01h 06m 02.050s[2] |
| Declination | –22° 27′ 11.35″[2] |
| Apparent magnitude (V) | 10.16[1] |
| Characteristics | |
| Spectral type | K5V[3] |
| Apparent magnitude (B) | 11.238[1] |
| B−V color index | 1.078±0.001[1] |
| Absolute magnitude (MV) | 7.11[1] |
| Details | |
Gyr | |
| Database references | |
Exoplanet Archive | data |
HIP 5158 is a
″·yr−1.[7]
The
rotation period of around 42.3 days. Based on the abundance of iron, this star appears metal rich, having concentration of heavy elements equal to 125% of solar abundance.[3] It has 75% of the mass of the Sun and 60% of the Sun's radius. The star is radiating just 19% of the luminosity of the Sun from its photosphere at an effective temperature of 4,571 K.[5]
Planetary system
In 2009, a gas giant planet HIP 5158 b was found in orbit around the star. The quadratic drift in the radial velocities did indicate the presence of an additional outer planet in the system,[3] which was confirmed in 2011. The large uncertainty in the mass of HIP 5158 c leaves in question whether this is an exoplanet or a brown dwarf.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.42 MJ | 0.89 | 345.72 ± 5.37 | 0.52 ± 0.08 | — | — |
| c | ≥15.04 MJ | 7.7±1.88 | 9,018±3181 | 0.14±0.1 | — | — |
See also
- List of extrasolar planets
References
- ^ S2CID 119257644.
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ .
- ^ .
- ^ S2CID 53971692. A5.
- ^ a b "CD−23 395". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-10.
- Bibcode:1995yCat.1098....0L.
- ^ S2CID 118517956.
