HD 89307
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Leo |
| Right ascension | 10h 18m 21s |
| Declination | +12º 37' 15″ |
| Apparent magnitude (V) | 7.06 |
| Absolute magnitude (V) | 4.47 |
| Distance | 108 ly (33 pc) |
| Spectral type | G0V |
| Other designations | |
HD 89307 is a yellow dwarf star in the constellation Leo. The magnitude is 7, located 33 pc away. The mass of the star is identical in value to the Sun.
In December 2004, it has a long-period giant planet in orbit around it.
[edit] HD 89307 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 3.28 AU |
| Eccentricity | (e) | 0.23±0.18 |
| Orbital period | (P) | 2159±70 d |
| Angular distance | (θ) | 99.4 mas |
| Longitude of periastron |
(ω) | 10.5° |
| Time of periastron | (T0) | 2,452,370±250 JD |
| Semi-amplitude | (K) | 31.0±4.9 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.92 MJ |
| Discovery information | ||
| Discovery date | Dec 26, 2004 | |
| Discoverer(s) | Marcy et al? | |
| Detection method | radial velocity | |
| Discovery site | United States | |
| Discovery status | Published | |
HD 89307 b is an extrasolar planet orbiting the star HD 89307, taking 187 megaseconds to orbit. The planet’s minimum mass is 1.92 MJ since the inclination is unknown. As it is typical for most of the long-period planets, the eccentricity is greater than any planets in our solar system; orbiting at the average distance of 491 gigameters. The speed of the wobble caused by the planet’s gravity is 31 meters per second. The average orbital velocity is 16.6 m/s.
[edit] References
- Butler et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505 – 522. doi:. (web Preprint)
[edit] External links
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