HD 100777
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Leo |
| Right ascension | 11h 35m 51.523s |
| Declination | -04° 45′ 20.51″ |
| Apparent magnitude (V) | +8.42 |
| Absolute magnitude (V) | +4.81 |
| Distance | 172.2 ly (52.8 pc) |
| Spectral type | K0 |
| Other designations | |
|
HIP 56572
|
|
HD 100777 is an orange star in the constellation Leo 1.629 Em from Earth. The apparent magnitude is 8 and absolute magnitude is 5. It is also called HIP 56572.
[edit] HD 100777 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.03 ± 0.03 AU |
| Eccentricity | (e) | 0.36 ± 0.02 |
| Orbital period | (P) | 383.7 ± 1.2 d |
| Angular distance | (θ) | 19.508 mas |
| Longitude of periastron |
(ω) | 202.7 ± 3.0° |
| Time of periastron | (T0) | 2,453,456.2 ± 2.3 JD |
| Semi-amplitude | (K) | 34.9 ± 0.8 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.17 ± 0.02 MJ |
| Discovery information | ||
| Discovery date | 2007 | |
| Discoverer(s) | Naef et al. | |
| Detection method | HARPS | |
| Discovery site | Chile | |
| Discovery status | Published | |
HD 100777 b is a 2.22 Wg planet taking 33.15 Ms to orbit at 154.1 Gm or 4.99 μpc from the star at 36% eccentricity. The velocity of the orbit is 28.1 km/s. Naef discovered his planet in early 2007 by using HARPS spectrograph located in Chile.
[edit] References
- D. Naef, M. Mayor, W. Benz, F. Bouchy, G. Lo Curto, C. Lovis, C. Moutou, F. Pepe, D. Queloz, N. C. Santos, and S. Udry (2007). "The HARPS search for southern extra-solar planets IX. Exoplanets orbiting HD 100777 , HD 190647 , and HD 221287". Astronomy & Astrophysics 470: 721–726. doi:.
[edit] External links
- Notes for star HD 100777
- Notes for planet HD 100777 b
- SIMBAD Query result
- SIMBAD Query result planet
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