HD 100777 b, formally named Laligurans,[2] is an extrasolar planet located approximately 172 light-years away in the constellationofLeo, orbiting the star HD 100777. It has a minimum mass about 1.17 times greater than Jupiter and takes about 384 days to orbit its star. It has a semi-major axis of 1.03 AU and a moderately eccentric orbit around its star. The velocity of the orbit is 29.3 km/s. Dominique Naef discovered this planet in March 2007 by using HARPS spectrograph located in Chile.[1]
| Discovery | |
|---|---|
| Discovered by | Dominique Naef et al.[1] |
| Discovery site | Chile |
| Discovery date | March 5, 2007 |
| Doppler spectroscopy (HARPS) | |
| Orbital characteristics | |
| Apastron | 1.40 AU (209,000,000 km) |
| Periastron | 0.659 AU (98,600,000 km) |
| 1.03 ± 0.03 AU (154,100,000 ± 4,500,000 km) | |
| Eccentricity | 0.36 ± 0.02 |
| 383.7 ± 1.2 d 1.050 y | |
Average orbital speed | 29.3 |
| 2,453,456.2 ± 2.3 | |
| 202.7 ± 3.0 | |
| Semi-amplitude | 34.9 ± 0.8 |
| Star | HD 100777 |
| Physical characteristics | |
| Mass | >1.17 ± 0.02 MJ |
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