HD 213240

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**HD 213240**
Observation data Epoch J2000.0
Constellation (pronunciation)	Grus
Right ascension	22h 31m 00.3672s
Declination	−49º 25' 59.7731″
Apparent magnitude (V)	6.80
Absolute magnitude (V)	3.75
Distance	132.91 ly (40.75 pc)
Spectral type	G0/G1V
Other designations
CD−50 13701, HIP 111143, SAO 231175

HD 213240 is a yellow star located in the constellation Grus. The magnitudes were m=6.80 and M=3.75. The distance is 132.91 light years or 40.75 parsecs or 1.2574 exameters away from the Earth. It is a main-sequence star with significant amounts of hydrogen in its core. It is a metal-rich star and more evolved than our local star. This star is also called HIP 111143.

[edit] HD 213240 b

**HD 213240 b**
Discovery
Discovered by	Santos et al.
Discovery site	Switzerland
Discovery date	2001
Detection method	Doppler Spectroscopy
Designations
Alternative names	HIP 111143 b SAO 231175 b
Orbital characteristics
Semi-major axis	1.92 AU
Eccentricity	0.421±0.015
Orbital period	882.7±7.6 d
Average orbital speed	23.7 km/s
Angular distance	47.12 mas
Longitude of periastron	201.0±3.2°
Time of periastron	2451499±12 JD
Semi-amplitude	96.6±2.0 m/s
Physical characteristics
Mass	>4.72 M_J

HD 213240 b is an extrasolar planet with a mass type of Ic and the appearance type of W (Water giant). It has an orbital period of 882.7 days or 76.27 megaseconds. The orbital distance is 1.92 astronomical units or 287 gigameters or 9.31 microparsecs. The orbital eccentricity is 42.1%. The closest distance and farthest distance are 1.11 AU and 2.73 AU respectively; the difference and quotient between q and Q are 1.62 AU and 2.46 times respectively. The angular separation between a planet and a star as seen from Earth is 47.12 milliarcsecond (mas).

The origin of this known planet came from the country of Switzerland and the astronomer Santos. The time was in 2001 and the method was Doppler spectroscopy.