| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 167042 | |
| Constellation | Draco | |
| Right ascension | (α) | 18h 10m 31.6403s |
| Declination | (δ) | +54° 17′ 11.588″ |
| Apparent magnitude | (mV) | 5.97 |
| Distance | 163 ly (50 pc) |
|
| Spectral type | K1III | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.30 AU |
| Periastron | (q) | 1.26 AU |
| Apastron | (Q) | 1.34 AU |
| Eccentricity | (e) | 0.027±0.04 |
| Orbital period | (P) | 412.6±4 d (1.130 y) |
| Orbital speed | (υ) | 34.4 km/s |
| Argument of periastron |
(ω) | 34±40° |
| Time of periastron | (T0) | 2453330±120 JD |
| Semi-amplitude | (K) | 29.7 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 1.7 MJ |
| Discovery information | ||
| Discovery date | Sept 20, 2007 published Oct 22, 2007 |
|
| Discoverer(s) | Johnson "et al." | |
| Detection method | radial velocity | |
| Discovery site | Lick Observatory | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HD 167042 b is a gas giant extrasolar planet located approximately 163 light-years away in the constellation of Draco, orbiting the star HD 167042. The mass 1.7 MJ is only minimum since the inclination of the orbital plane is unknown. As it is typical for most known extrasolar planets, it orbits less than 3 AU from the parent star, hence taking less than 2000 days (5.5 years) to revolve. For this planet, it orbits at 1.30 AU and taking 413 days to revolve around the star. Unlike most exoplanets, the eccentricity of the orbit is low, only 3%.
This planet was discovered in 2007 on September 20 and published October 22. This planet was typical as it was discovered spectroscopically using the radial velocity method.