HD 181433 d

DiscoveredbyBouchy et al.^[1]

Discoverysite La Silla Observatory

DiscoverydateDecember 9, 2008^[1]

Detection method

Doppler spectroscopy

HD 181433 d

Discovery
Discovered by	Bouchy et al.[1]
Discovery site	La Silla Observatory
Discovery date	December 9, 2008[1]
Detection method	Doppler spectroscopy
Orbital characteristics
Apastron	4.44 AU (664,000,000 km)
Periastron	1.56 AU (233,000,000 km)
Semi-major axis	3.00 AU (449,000,000 km)[2]
Eccentricity	0.48 ± 0.05[2]
Orbital period (sidereal)	2172 ± 158[2] d 5.947 y
Average orbital speed	15.1
Time of periastron	2452154 ± 194[2]
Argument of periastron	-30 ± 13[2]
Star	HD 181433

HD 181433 d is an extrasolar planet located approximately 87 light years away^[3] in the constellation of Pavo, orbiting the star HD 181433. This planet has a minimum mass of 0.54 Jupiter mass and takes 2172 days to orbit the star. The average orbital distance is 3.00 AU. At periastron distance, it will have distance from the star similar to Mars’ distance from the Sun at 1.56 AU. At apastron, the distance is 4.44 AU. These corresponds to the orbital eccentricity of 0.48.^[2]