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HD 70642 b
Extrasolar planet List of extrasolar planets
Parent star
Star HD 70642
Constellation Puppis
Right ascension (α) 08h 21m 28.1361s
Declination (δ) −39° 42′ 19.474″
Apparent magnitude (mV) 7.18
Distance 93.8 ly
(28.76 pc)
Spectral type G5V
Orbital elements
Semimajor axis (a) 3.232 AU
(483.5 Gm)
    112.4 mas
Periastron (q) 3.123 AU
(467.2 Gm)
Apastron (Q) 3.341 AU
(499.8 Gm)
Eccentricity (e) 0.034 ± 0.043
Orbital period (P) 2068 ± 39 d
(5.66 y)
Orbital speed (υ) 17.06 km/s
Argument of
(ω) 205°
Time of periastron (T0) 2,451,350 ± 380 JD
Semi-amplitude (K) 30.4 ± 1.3 m/s
Physical characteristics
Minimum mass (m sin i) 1.97 ± 0.06 MJ
Discovery information
Discovery date July 3, 2003
Discoverer(s) Carter et al.
Detection method Radial velocity
(Anglo-Australian Telescope)
Discovery site Anglo-Australian Observatory
Discovery status Published
Other designations
Gliese 304 b, HIP 40952 b
Database references
Extrasolar Planets

HD 70642 b (also known as HIP 40952 b and Gliese 304 b) is an extrasolar planet orbiting the star HD 70642 at 3.23 AU distance and takes 5.66 years to revolve. This planet is a “Jupiter-twin” because it is very similar to Jupiter in our Solar System, though only three-fifths the distance, twice as massive, and two-thirds as eccentric. This planet may have systems of moons like Jupiter. This planet was discovered on July 3, 2003.


See also

External links

Coordinates: Sky map 08h 21m 28.1361s, −39° 42′ 19.474″



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