HD 4308 b is a low-mass exoplanet orbiting around HD 4308. It is believed to have almost no orbital eccentricity.[1]
Artist's conception | |
| Discovery | |
|---|---|
| Discovered by | Udry et al. |
| Discovery site | California, United States |
| Discovery date | 22 August 2005 |
Detection method | Doppler Spectroscopy |
| Orbital characteristics | |
| Apastron | 0.115 AU (17,200,000 km) |
| Periastron | 0.115 AU (17,200,000 km) |
Semi-major axis | 0.115 ± 0.096 AU (17,200,000 ± 14,400,000 km) |
| Eccentricity | 0.00 ± 0.01 |
Orbital period (sidereal) | 15.56 ± 0.02 d 0.04260 y |
Time of periastron | 2,453,314.70 ±2.0 |
Argument of periastron | 359±47 |
| Semi-amplitude | 4.07 ± 0.2 |
| Star | HD 4308 |
| Physical characteristics | |
| Mass | >0.0442 MJ (>14 MEarth) |