HD 170469 b
| Exoplanet | List of exoplanets | |
|---|---|---|
 of Mars (1.5AU) in our Solar System. | ||
| Parent star | ||
| Star | HD 170469 | |
| Constellation | Ophiuchus | |
| Right ascension | (α) | 18h 29m 10.9801s |
| Declination | (δ) | +11° 41′ 43.807″ |
| Distance | 211.91 ly (64.97 pc) | |
| Spectral type | G5IV | |
| Orbital elements | ||
| Semi-major axis | (a) | 2.24 AU |
| Eccentricity | (e) | 0.11 ± 0.08 |
| Orbital period | (P) | 1145 ± 18 d (3.13 y) |
| Orbital speed | (υ) | 19.8 km/s |
| Argument of periastron |
(ω) | 73 ± 19° |
| Time of periastron | (T0) | 2,451,826 ± 4 JD |
| Semi-amplitude | (K) | 23.8 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.67 MJ |
| Discovery information | ||
| Discovery date | April 10, 2007 | |
| Discoverer(s) | Fischer et al. | |
| Discovery method | Radial velocity | |
| Discovery site | California, USA | |
| Discovery status | Published[1] | |
| Other designations | ||
| HIP 90593 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 170469 b is a gas giant exoplanet located approximately 212 light-years away in the constellation Ophiuchus, orbiting the star HD 170469. This planet was discovered in April 2007. The star is 1.1 solar mass and the planet is at least 67% the mass of Jupiter, orbiting about half the distance of Jupiter from the Sun. The mass value is only minimum since the inclination is unknown.
The orbital distance is more than twice the distance from Earth to the Sun, although taking over three Earth years to orbit the star. The combined distance and period would make orbital velocity of 19.8 km/s, slower than Earth's 29.8 km/s.[1]
References
- 1 2 Fischer, Debra A.; et al. (2007). "Five Intermediate-Period Planets from the N2K Sample". The Astrophysical Journal 669 (2): 1336–1344. arXiv:0704.1191. Bibcode:2007ApJ...669.1336F. doi:10.1086/521869.
External links
- "HD 170469". Exoplanets.
Coordinates: 
18h 29m 10.9801s, +11° 41′ 43.807″
This article is issued from Wikipedia - version of the Friday, December 19, 2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.