HD 114783
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| Observation data Equinox 2000 |
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|---|---|
| Constellation | Virgo |
| Right ascension | 13h 12m 43.79s |
| Declination | -2° 15' 54.14" |
| Apparent magnitude (V) | 7.57 |
| Distance | 66.60 ly (20.43 pc) |
| Spectral type | K0 |
| Other designations | |
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GJ 3769, BD-01°2784, HIP 64457
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HD 114783 is an 8th magnitude star in the constellation of Virgo. As an orange dwarf it is somewhat dimmer and cooler than our Sun. The spectral type of the star is K0 V. The star is not visible with the unaided eye, but is easy target for binoculars.
In 2001, the California and Carnegie Planet Search team found an extrasolar planet orbiting the star. The discovery was made with the Keck Telescope.
[edit] HD 114783 b
| Extrasolar planet | Lists of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.169±0.068 AU |
| Eccentricity | (e) | 0.085±0.033 |
| Orbital period | (P) | 496.9±2.3 d |
| Inclination | (i) | ?° |
| Longitude of periastron |
(ω) | 93±25° |
| Time of periastron | (τ) | 2,450,840 ±37 JD |
| Physical characteristics | ||
| Mass | (m) | >1.034±0.089 MJ |
| Radius | (r) | ? RJ |
| Density | (ρ) | ? kg/m3 |
| Temperature | (T) | ? K |
| Discovery information | ||
| Discovery date | 2001 | |
| Discoverer(s) | Vogt, Butler, Marcy et al. |
|
| Detection method | Radial velocity | |
| Discovery status | Published | |
The planet, designated as HD 114783 b, has a minimum mass almost exactly that of Jupiter. However, since the true mass is not known, it may be more massive, but not likely much. It orbits the star 20% further than Earth orbits the Sun. The orbit is quite circular. Because the star is less luminous and warm than the Sun, the planet is considerably colder than the Earth.
[edit] References
- Vogt et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal 568: 552-562.
- Butler, R. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646: 505 – 522. (web Preprint)
[edit] External links
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