| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 100777 | |
| Constellation | Leo | |
| Right ascension | (α) | 11h 35m 51.5234s |
| Declination | (δ) | -04° 45′ 20.509″ |
| Distance | 172.2 ly (52.8 pc) |
|
| Spectral type | K0IV | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.03 ± 0.03 AU |
| Periastron | (q) | 0.659 AU |
| Apastron | (Q) | 1.40 AU |
| Eccentricity | (e) | 0.36 ± 0.02 |
| Orbital period | (P) | 383.7 ± 1.2 d (1.050 y) |
| Orbital speed | (υ) | 29.3 km/s |
| Argument of periastron |
(ω) | 202.7 ± 3.0° |
| Time of periastron | (T0) | 2,453,456.2 ± 2.3 JD |
| Semi-amplitude | (K) | 34.9 ± 0.8 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.17 ± 0.02 MJ |
| Discovery information | ||
| Discovery date | March 5, 2007 | |
| Discoverer(s) | Naef et al. | |
| Detection method | HARPS | |
| Discovery site | Chile | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HD 100777 b is an extrasolar planet located approximately 172 light-years away in the constellation of Leo, orbiting the star HD 100777. This is a >1.17 MJ planet taking 33.15 Ms to orbit at 154.1 Gm or 4.99 μpc from the star at 36% eccentricity. The velocity of the orbit is 29.3 km/s. Dominique Naef discovered this planet in March 2007 by using HARPS spectrograph located in Chile.