HD 102956 b
HD 102956 b or Isagel is an extrasolar planet discovered in 2010 by a team of American astronomers led by John Johnson using Doppler spectroscopy and the Keck Observatory in Hawaii. HD 102956 b is in the orbit of host star HD 102956. The planet is at most the mass of Jupiter, orbiting every 6.5 days at a distance of 12 million km. HD 202956 b has a very circular orbit. The system is roughly 399 light years from us.
Artist's impression HD 102956 b | |
| Discovery | |
|---|---|
| Discovered by | Johnson et al. |
| Discovery site | Keck Observatory |
| Discovery date | 2010 |
Detection method | Doppler spectroscopy |
| Orbital characteristics | |
Semi-major axis | 0.0807±0.0073 AU |
| Eccentricity | 0.037±0.019 |
Orbital period (sidereal) | 6.49470±0.00019 d |
| 2455351.45±0.64 JD | |
| 301±33 º | |
| Semi-amplitude | 74.6±1.8 m/s |
| Star | HD 102956 |
| Physical characteristics | |
| Mass | ≥0.960±0.023 MJ |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 11h 51m 22.5111s |
| Declination | +57° 38′ 26.6427″ |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | A |
| Astrometry | |
| Radial velocity (Rv) | −25±83 km/s |
| Proper motion (μ) | RA: −11.24±0.049 mas/yr Dec.: −17.578±0.049 mas/yr |
| Parallax (π) | 8.1753 ± 0.0290 mas |
| Distance | 399 ± 1 ly (122.3 ± 0.4 pc) |
| Absolute magnitude (MV) | 2.5 |
| Details | |
| Mass | 1.68±0.11 M☉ |
| Radius | 4.4±0.1 R☉ |
| Luminosity (visual, LV) | 11.6±0.5 L☉ |
| Temperature | 5054±44 K |
| Metallicity [Fe/H] | +0.19±0.04 dex |
| Rotational velocity (v sin i) | 0.30 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.