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.

HD 170469 b

HD 170469 b's orbit compared to the orbit of Mars (1.5AU) in our Solar System.
Discovery
Discovered by	Fischer et al.
Discovery site	California, USA
Discovery date	April 10, 2007
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	2.24 AU (335,000,000 km)
Eccentricity	0.11 ± 0.08
Orbital period (sidereal)	1145 ± 18 d 3.13 y
Average orbital speed	19.8
Time of periastron	2,451,826 ± 4
Argument of periastron	73 ± 19
Semi-amplitude	23.8
Star	HD 170469

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

External links

• "HD 170469". Exoplanets. Archived from the original on 2012-02-19. Retrieved 2008-10-25.

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