HD 90156
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Hydra |
| Right ascension | 10h 23m 55.2749s |
| Declination | –29° 38′ 43.905″ |
| Apparent magnitude (V) | 6.947 |
| Characteristics | |
| Spectral type | G5V |
| Apparent magnitude (B) | 7.572 |
| Apparent magnitude (J) | 5.685 |
| Apparent magnitude (H) | 5.382 |
| Apparent magnitude (K) | 5.245 |
| B−V color index | 0.625 |
| Astrometry | |
| Radial velocity (Rv) | 26.4 km/s |
| Proper motion (μ) | RA: –38.02 mas/yr Dec.: 99.72 mas/yr |
| Parallax (π) | 45.26 ± 0.75 mas |
| Distance | 72 ± 1 ly (22.1 ± 0.4 pc) |
| Absolute magnitude (MV) | 5.226 |
| Details | |
| Mass | 0.99 M☉ |
| Radius | 0.87 ± 0.05 R☉ |
| Luminosity | 0.698 ± 0.03 L☉ |
| Temperature | 5670 ± 100 K |
| Metallicity | -0.24 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia |
data |
HD 90156 is a 7th magnitude G-type main sequence star located approximately 129 light years away in the constellation Hydra. This star is smaller, cooler, fainter, and less massive than our Sun. Also its metal content is over half as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥17.98 ± 1.46 M⊕ | 0.250 ± 0.004 | 49.77 ± 0.07 | 0.31 ± 0.10 | — | — |
See also [edit]
References [edit]
- ^ Mordasini, C. et al. (2011). "The HARPS search for southern extrasolar planets XXIV. Companions to HD 85390, HD 90156, and HD 103197: a Neptune analog and two intermediate-mass planets". Astronomy and Astrophysics 526 (A111). arXiv:1010.0856. Bibcode:2011A&A...526A.111M. doi:10.1051/0004-6361/200913521.(web Preprint)
Coordinates: 
10h 23m 55.2749s, −29° 38′ 43.905″
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