HD 88133
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| Observation data Equinox 2000 |
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|---|---|
| Constellation | Leo |
| Right ascension | 10h 10m 7.68s |
| Declination | +18° 11' 12.74" |
| Apparent magnitude (V) | 8.06 |
| Distance | 242.7 ly (74.46 pc) |
| Spectral type | G5 IV |
| Other designations | |
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BD+18°2326, HIP 49813
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|
HD 88133 is an 8th magnitude star in the constellation of Leo. It is classified as a yellow subgiant star (spectral type G5 IV). It is slightly more massive than our Sun, cooler and more luminous. As a subgiant, it has left the main sequence and started to evolve towards red gianthood. Located at a distance of 240 light years from Earth it is not in our immediate neighbourhood and thus not visible to the unaided eye. With a small telescope it should be easily visible.
In 2004 a planet was found to orbit the star.
[edit] HD 88133 b
| Extrasolar planet | Lists of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.0472±0.0027 AU |
| Eccentricity | (e) | 0.133±0.072 |
| Orbital period | (P) | 3.41587±0.00059 d |
| Inclination | (i) | ?° |
| Longitude of periastron |
(ω) | 349° |
| Time of periastron | (τ) | 2,453,016.31±0.32 JD |
| Physical characteristics | ||
| Mass | (m) | >0.299±0.033 MJ |
| Radius | (r) | ? RJ |
| Density | (ρ) | ? kg/m3 |
| Temperature | (T) | ? K |
| Discovery information | ||
| Discovery date | 2004 | |
| Discoverer(s) | Fischer, Laughlin, Butler et al. |
|
| Detection method | Radial velocity | |
| Discovery status | Published | |
HD 88133 b is an extrasolar planet orbiting the star HD 88133. It is probably less massive than Jupiter and even Saturn. It orbits the star in a very tight orbit, completing one revolution around the star in every three and half days or so. Despite the relatively large radius of the star (about 2 times Solar), no transits have been detected.
[edit] References
- Fischer et al. (2005). "The N2K Consortium. I. A Hot Saturn Planet Orbiting HD 88133". The Astrophysical Journal 620: 481-486.
- Butler, R. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646: 505 – 522. (web Preprint)
[edit] External links
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