HD 167042
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Draco |
| Right ascension | 18h 10m 31.64s |
| Declination | +54° 17′ 11.58″ |
| Apparent magnitude (V) | +5.97 |
| Absolute magnitude (V) | +2.48 |
| Distance | 163 ly (50 pc) |
| Spectral type | K1III |
| Other designations | |
HD 167042 is a star located in Draco constellation. It is a 6th magnitude star located 50 parsecs away. It is a K-type giant star with a mass of 1.64 times that of the Sun and the age is only 2.2 billion years old. When this star was a main-sequence, it was white mid to late A-type star based on its mass.
Contents |
[edit] HD 167042 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.30 AU |
| Eccentricity | (e) | 0.027±0.04 |
| Orbital period | (P) | 412.6±4 d |
| Angular distance | (θ) | 26 mas |
| Longitude of periastron |
(ω) | 34±40° |
| Time of periastron | (T0) | 2453330±120 JD |
| Semi-amplitude | (K) | 29.7 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.7 MJ |
| Discovery information | ||
| Discovery date | Sept 20, 2007 published Oct 22, 2007 |
|
| Discoverer(s) | Johnson et al. | |
| Detection method | radial velocity | |
| Discovery status | Published | |
HD 167042 b is a gas giant planet 1.7 times that of Jupiter. The mass is only minimum since the inclination of the orbital plane is unknown. As it is typical for most 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This planet was discovered in Sept 2007 and is currently unpublished because the discoverers didn't write a paper to other astronomers to agree the discovery. However on October 22, this planet is now published. This planet was typical as it was discovered by using radial velocity mounted on the spectroscope.
[edit] See also
[edit] References
- JOHNSON J., MARCY G., FISCHER D., WRIGHT J., REFFERT S., KREGENOW J., WILLIAMS P. & PEEK K. (2007). "Retired A Stars and Their Companions II: Jovian planets orbiting kappa CrB, HD167042 and HD16175". ApJ..
[edit] External links
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