HD 213240

HD 213240 is a yellow main sequence star located approximately 133 light years (41 parsecs) away in the constellation Grus. The magnitudes were m=6.80 and M=3.75. It is a metal-rich star and more evolved than our sun. Its age has been calculated as being anywhere from 2.7 to 4.6 billion years.[1] A red dwarf companion star was detected in 2005 with a projected separation of 3898 AU.[1]

HD 213240
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Grus
Right ascension  22h 31m 00.3672s
Declination −49° 25′ 59.773″
Apparent magnitude (V) 6.80
Absolute magnitude (V)3.75
Distance132.91 ly
(40.75 pc)
Spectral typeG0/G1V
Other designations
CD−50 13701, HIP 111143, LTT 9047, SAO 231175
Database references
SIMBADdata

Planetary system

The Geneva extrasolar planet search team discovered a planet orbiting this star in 2001.[2]

The HD 213240 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >4.72 ± 0.40 MJ 1.92 ± 0.11 882.7 ± 7.6 0.421 ± 0.015 — —

See also

References
  1. Mugrauer; Neuhäuser, R.; Seifahrt, A.; Mazeh, T.; Guenther, E. (2005). "Four New Wide Binaries Among Exoplanet Host Stars". Astronomy and Astrophysics. 440 (3): 1051–1060. arXiv:astro-ph/0507101. Bibcode:2005A&A...440.1051M. doi:10.1051/0004-6361:20042297.
  2. Santos, N. C.; et al. (2001). "The CORALIE survey for southern extra-solar planets VI. New long period giant planets around HD 28185 and HD 213240". Astronomy and Astrophysics. 379 (3): 999–1004. arXiv:astro-ph/0106255. Bibcode:2001A&A...379..999S. doi:10.1051/0004-6361:20011366.
  3. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.


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