HD 170469 b

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HD 170469 b
Exoplanet List of exoplanets
HD 170469 b's orbit compared to the orbit
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″
Distance211.91 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
(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
Exoplanet Archivedata
Open Exoplanet Cataloguedata

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]


  1. ^ a b 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[edit]

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