HD 213240
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Observation data Epoch J2000.0 |
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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 | |
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
Discovery
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Discovered by | Santos et al. |
Discovery site | Switzerland |
Discovery date | 2001 |
Detection method | Doppler Spectroscopy |
Designations
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Alternative names | HIP 111143 b SAO 231175 b |
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
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Mass | >4.72 MJ |
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.
[edit] References
- Santos et al. (2001). "The CORALIE survey for southern extra-solar planets VI. New long period giant planets around HD 28185 and HD 213240". Astronomy & Astrophysics 379: 999–1004. doi: .
- Mugrauer et al. (2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics 440 (3): 1051–1060. doi: .
[edit] External links
- Notes for star HD 213240. The Extrasolar Planets Encyclopaedia. Retrieved on December 16, 2007.
- Notes for planet HD 213240 b. The Extrasolar Planets Encyclopaedia. Retrieved on December 16, 2007.
- HD 213240 – Yellow Subgiant Star. Extrasolar Visions. Retrieved on December 16, 2007.
- HD 213240 B – Water Cloud Jovian, Eccentric. Extrasolar Visions. Retrieved on December 16, 2007.
- HD 213240 -- Star. SIMBAD. Retrieved on December 16, 2007.
- HD 213240 b -- Extra-solar Planet Candidate. SIMBAD. Retrieved on December 16, 2007.