HD 147513
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| Observation data Epoch 2000 |
|
|---|---|
| Constellation (pronunciation) |
Scorpius |
| Right ascension | 16h 24m 01.29s |
| Declination | -39° 11' 34.73" |
| Apparent magnitude (V) | 5.38 |
| Distance | 41.96 ly (12.87 pc) |
| Spectral type | G5V |
| Other designations | |
|
Gl 620.1, CD-38°10983, SAO 207622,
HR 6094, HIP 80337, WO 9559 |
|
HD 147513 is a 5th magnitude star in the constellation of Scorpius. It is a yellow star remarkably similar to our Sun. It is however slightly less massive and considerably younger being only 300 million years old.
In 2002 the Geneva Extrasolar Planet Search Team announced the discovery of an extrasolar planet orbiting the star.
[edit] HD 147513 b
|
Discovery
|
|
|---|---|
| Discovered by | Mayor et al. |
| Discovery site |  France |
| Discovery date | June 19, 2002 |
| Detection method | Radial velocity |
| Semi-major axis | 1.32 AU |
| Eccentricity | 0.26 ± 0.05 |
| Orbital period | 528.4 ± 6.3 d |
| Angular distance | 98 mas |
| Longitude of periastron | 282° ± 9° |
| Time of periastron | 2,451,123 ± 20 JD |
| Semi-amplitude | 29.3 ± 1.8 m/s |
|
Physical characteristics
|
|
| Mass | >1.21 MJ |
The planet, designated as HD 147513 b, is probably very similar in mass to Jupiter. But unlike Jupiter, it orbits the star much closer, mean distance being only a quarter more than Earth's distance from the Sun. The orbit is also very eccentric; at periastron the planet is closer to the star than Venus is from the Sun, whereas near apastron the planet is more than three times as distant.
[edit] References
- Mayor et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE" (abstract). Astronomy and Astrophysics 415: 391–402. doi:. (web Preprint)
[edit] External links
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