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Discovery
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|---|---|
| Discovered by | Udry et al. |
| Discovery site | California, USA |
| Discovery date | February 1, 1999 |
| Detection method | Radial velocity |
| Semi-major axis | 0.0482 ± 0.0028 AU |
| Eccentricity | 0.034 ± 0.029 |
| Orbital period | 3.509267 ± 0.000064 d |
| Longitude of periastron | 141° |
| Time of periastron | 2,450,830.34 ± 0.48 JD |
| Semi-amplitude | 54.9 ± 1.8 m/s |
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Physical characteristics
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| Mass | >0.467 ± 0.041 MJ |
HD 75289 b is an extrasolar planet orbiting the star HD 75289 in Vela constellation. It has a minimum mass half that of Jupiter, and it orbits in a very short orbit completing one circular revolution around the star in three and a half days. By studying the starlight scientists have concluded that the planet must have an albedo less than 0.12, rather low for a gas giant. Otherwise its reflected light would have been detected.
This planet was discovered on February 1, 1999 in California, USA by Stephane Udry who used the wobble method (radial velocity method).