HD 213240 b

HD 213240 b

Discovery [1]
Discovered by	Santos et al.
Discovery site	Geneva Extrasolar Planet Search
Discovery date	April 4, 2001
Detection method	Doppler spectroscopy
Orbital characteristics [2]
Semi-major axis	1.92±0.026  AU
Eccentricity	0.4201+0.01 −0.0093
Orbital period (sidereal)	879±3  d 2.4071+0.008 −0.0083  yr
Average orbital speed	23.7
Inclination	63°+17° −20° or 117°+20° −17°
Longitude of ascending node	145°+21° −121°
Time of periastron	2455901±12
Argument of periastron	201.9°+1.4° −1.5°
Semi-amplitude	96.6 ± 2.0
Star	HD 213240
Physical characteristics [2]
Mass	5.21+1.5 −0.49  MJ

HD 213240 b is an exoplanet located 134 light-years (41 parsecs ) from the Solar System in the constellation of Grus. It is a gas giant orbiting the G-type star HD 213240. ^[3]

The planet was discovered in 2001 as part of the CORALIE ^[4] extra-solar planet search program. It was described in a 2001 publication by astronomers N. C. Santos, M. Mayor, D. Naef, F. Pepe, D. Queloz, S. Udry and M. Burnet of Observatoire de Genève, Switzerland. ^[1] Doppler spectroscopy was used. In 2023, the inclination and true mass of HD 213240 b were determined via astrometry. ^[2]

See also

• HD 212301 b
• Methods of detecting extrasolar planets

References

1. 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. S2CID   59061741.
2. Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics . 23 (5): 055022. arXiv: 2303.12409 . Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
3. "HD 213240". Exoplanet Exploration. NASA. Retrieved 3 October 2020.
4. "CORALIE". European Southern Observatory. Retrieved 3 October 2020.

External links

• "Notes for planet HD 213240 b". Extrasolar Planets Encyclopaedia . Retrieved 2008-08-29.
• "HD 213240". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-08-29.