| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 153950 | |
| Constellation | Scorpius | |
| Right ascension | (α) | 17h 04m 30.8715s |
| Declination | (δ) | –43° 18′ 35.172″ |
| Apparent magnitude | (mV) | 7.39 |
| Distance | 162 ± 5.9 ly (49.6 ± 1.8 pc) |
|
| Spectral type | F8V | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.28 ± 0.01 AU (191 ± 1 Gm) |
| Eccentricity | (e) | 0.34 ± 0.021 |
| Orbital period | (P) | 499.4 ± 3.6 d (1.367 ± 0.010 y) |
| Orbital speed | (υ) | 28.0 km/s |
| Argument of periastron |
(ω) | 308.2 ± 2.4° |
| Time of periastron | (T0) | 2,454,502 ± 4.1 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 2.73 ± 0.05 MJ (868 ± 16 M⊕) |
| Discovery information | ||
| Discovery date | October 26, 2008 | |
| Discoverer(s) | Moutou et al. | |
| Detection method | Doppler spectroscopy (HARPS) |
|
| Discovery site | La Silla Observatory | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HD 153950 b is an extrasolar planet located approximately 162 light-years away in the constellation of Scorpius, orbiting the 7th magnitude F-type main sequence star HD 153950. This planet has mass about 2.73 times that of Jupiter, but because the inclination is not known, the mass value is only minimum. So in next decade, the Gaia mission, Space Interferometry Mission, or James Webb Space Telescope will determine the inclination of every known extrasolar planets, including this planet. This planet takes about 499 days to orbit at an orbital distance about 1.28 AU and range from 0.84 to 1.72 AU, corresponding to the orbital eccentricity of 0.34.
This planet was discovered on October 26, 2008 by Moutou et al. using the HARPS spectrograph on ESO’s 3.6 meter telescope installed at La Silla Observatory in Atacama desert, Chile.