HD 2638 b

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HD 2638 b
Exoplanet List of exoplanets
Parent star
Star HD 2638
Constellation Cetus
Right ascension (α) 00h 29m 59.873s[1]
Declination (δ) –05° 45′ 50.40″[1]
Distance 160 ± 10[1] ly
(50 ± 4[1] pc)
Spectral type G5V
Orbital elements
Semi-major axis (a) 0.044 AU
Eccentricity (e) 0
Orbital period (P) 3.4442 ± 0.0002 d
Argument of
Time of periastron (T0) 2,453,323.206
± 0.002 JD
Semi-amplitude (K) 67.4 ± 0.4 m/s
Physical characteristics
Mass (m) >0.48 MJ
Discovery information
Discovery date 2005
Discoverer(s) Moutou, Mayor,
Bouchy et al.
Discovery method Radial velocity
Discovery site Geneva
Discovery status Published

HD 2638 b is a planet of the star HD 2638. It is a typical "hot Jupiter", a planet that orbits its parent star in a very tight "torch orbit". Distance to the star is less than 1/20th Earth's distance from the Sun. One orbital revolution lasts only about three and half days.[2]


External links[edit]

Coordinates: Sky map 00h 29m 59.87s, −05° 45′ 50.41″