Beta Pictoris b
Beta Pictoris b (abbreviated as β Pic b) is an exoplanet orbiting the young debris disk A-type main sequence star Beta Pictoris located approximately 63 light-years (19.4 parsecs, or 6×1014 km) away from Earth in the constellation of Pictor. It has a mass around 13 Jupiter masses and a radius around 46% larger than Jupiter's. It orbits at 9 AU from Beta Pictoris, which is about 3.5 times farther than the orbit of Beta Pictoris c. It orbits close to the plane of the debris disk orbiting the star, with a low eccentricity and a period of 20–21 years.
The motion of Beta Pictoris b. The orbital plane is viewed side-on; the planet is not moving towards the star. | |
| Discovery | |
|---|---|
| Discovered by | Lagrange et al. |
| Discovery site | Very Large Telescope |
| Discovery date | November 18, 2008 |
Detection method | Direct imaging |
| Orbital characteristics | |
Semi-major axis | 10.018+0.082 −0.076 AU |
| Eccentricity | 0.106+0.007 −0.006 |
Orbital period (sidereal) | 23.593+0.248 −0.209 yr |
| Inclination | 89.009°±0.012° |
Longitude of ascending node | 31.774°+0.008° −0.009° |
| 2448022.339+15.635 −24.710 | |
| 21.835°+4.099° −4.044° | |
| Semi-amplitude | 78.791+15.672 −14.126 m/s |
| Star | Beta Pictoris |
| Physical characteristics | |
Mean radius | 1.46±0.01 RJ |
| Mass | 11.729+2.337 −2.135 MJ |
Synodic rotation period | 8.7±0.8 h |
Equatorial rotation velocity | 19.9±1.0 km/s |
| Temperature | 1,724 K (1,451 °C; 2,644 °F) ±15 K (15 °C; 27 °F) |
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