| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
(Artist's impression) |
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| Parent star | ||
| Star | HD 154345 | |
| Constellation | Hercules | |
| Right ascension | (α) | 17h 02m 36.40s |
| Declination | (δ) | +47° 04′ 54.77″ |
| Apparent magnitude | (mV) | 6.74 |
| Distance | 58.91 ± 0.59 ly (18.06 ± 0.18 pc) |
|
| Spectral type | G8V | |
| Mass | (m) | 0.88 M☉ |
| Orbital elements | ||
| Semimajor axis | (a) | 4.18 AU (625 Gm) |
| 89.9 mas | ||
| Periastron | (q) | 4.03 AU (603 Gm) |
| Apastron | (Q) | 4.33 AU (647 Gm) |
| Eccentricity | (e) | 0.036 ± 0.046 |
| Orbital period | (P) | 3322 ± 93 d (9.095 y) |
| Orbital speed | (υ) | 13.7 km/s |
| Argument of periastron |
(ω) | 113° |
| Time of periastron | (T0) | 2,453,230 ± 330 JD |
| Semi-amplitude | (K) | 14.28 ± 0.75 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.963 MJ |
| Discovery information | ||
| Discovery date | March 12, 2006 (confirmed: May 27, 2007) |
|
| Discoverer(s) | Wright et al. | |
| Detection method | radial velocity | |
| Discovery site | United States | |
| Discovery status | published | |
| Other designations | ||
|
Gliese 651 b, HIP 83389 b, SAO 46452 b
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| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HD 154345 b, is a Jupiter-sized extrasolar planet orbiting the star HD 154345.
Contents |
Wright et al. discovered the planet in March 2006 using the radial velocity method to detect the small wobbling movement of the star caused by the gravity of the planet. The discovery was confirmed in May 2007.[1]
The planet is a gas giant with a mass at least slightly less than that of Jupiter and is likely to be a near twin of Jupiter, estimated to be around the same size, or slightly larger. It may also harbor a system of moons and rings. It orbits its parent star at the distance of 4.18 AU. Its orbital period is about 9.095 Earth years and its orbit is circular.[2]
Coordinates: 17h 02m 36.40s, +47° 04′ 54.77″
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