Astronomy:HD 170469 b

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HD 170469 b
PlanetQuest-HD170469b.png
HD 170469 b's orbit compared to the orbit
of Mars (1.5AU) in our Solar System.
Discovery
Discovered byFischer et al.
Discovery siteCalifornia, USA
Discovery dateApril 10, 2007
Radial velocity
Orbital characteristics
2.24 AU (335,000,000 km)
Eccentricity0.11 ± 0.08
Orbital period1145 ± 18 d
3.13 y
Average Orbital speed19.8
astron|astron|helion}}2,451,826 ± 4
73 ± 19
Semi-amplitude23.8
StarHD 170469


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. Fischer, Debra A. et al. (2007). "Five Intermediate-Period Planets from the N2K Sample". The Astrophysical Journal 669 (2): 1336–1344. doi:10.1086/521869. Bibcode2007ApJ...669.1336F. 

External links

Coordinates: Sky map 18h 29m 10.9801s, +11° 41′ 43.807″