HD 149143
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Ophiuchus |
| Right ascension | 16h 32m 51.0498s |
| Declination | +02º 05' 05.3954″ |
| Apparent magnitude (V) | 7.90 |
| Absolute magnitude (V) | 3.89 |
| Distance | 207 ly (63.5 pc) |
| Spectral type | G0 |
| Other designations | |
HD 149143 is a star located in Ophiuchus constellation that has spectral type of G0 located at a distance of 207 ly from us. Its apparent magnitude of the star is 7.9 (binocular object) and the absolute magnitude is 3.9 (naked-eye object).
[edit] HD 149143 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.0531 AU |
| Eccentricity | (e) | 0 |
| Orbital period | (P) | 4.07±0.70 d |
| Angular distance | (θ) | 0.836 mas |
| Longitude of periastron |
(ω) | 0° |
| Time of periastron | (T0) | 2453483.9±1.2 JD |
| Semi-amplitude | (K) | 149.6±3 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.33 MJ |
| Discovery information | ||
| Discovery date | 2005 | |
| Discoverer(s) | Da Silva et al. | |
| Detection method | Doppler Spectroscopy | |
| Discovery status | Published | |
HD 149143 b is a 2005 exoplanet that has a minimum mass (unknown inclination) of 1.33 Jupiter mass. Its orbital period is 0.35 megaseconds and the semimajor axis would be 7.94 gigameters. As it is tyical for a lot of hot Jupiters, its orbital eccentricity value is practically zero and has high semi-amplitude of 150 meters per second.
[edit] References
- Da Silva et al. (2006). "Elodie metallicity-biased search for transiting Hot Jupiters I. Two Hot Jupiters orbiting the slightly evolved stars HD118203 and HD149143". Astron. & Astrophys. 446: 717–722.
- Fischer et al. (2006). "The N2K Consortium. III. Short-Period Planets Orbiting HD 149143 and HD 109749". The Astrophysical Journal 637 (2): 1094 – 1101. doi:.
[edit] External links
- HD 149143 -- Star. SIMBAD Astronomical Database. Retrieved on December 12, 2007.
- HD 149143b -- Extra-solar Planet Candidate. SIMBAD Astronomical Database. Retrieved on December 12, 2007.
- Notes for star HD 149143. The Extrasolar Planets Encyclopaedia. Retrieved on December 12, 2007.
- Notes for planet HD 149143 b. The Extrasolar Planets Encyclopaedia. Retrieved on December 12, 2007.
- Star Table. Catalog of Nearby Exoplanets. Retrieved on December 12, 2007.
- Planet Table. Catalog of Nearby Exoplanet. Retrieved on December 12, 2007.
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