HD 114729 b

HD 114729 b
Exoplanet List of exoplanets
Parent star
Star HD 114729
Constellation Centaurus
Right ascension (α) 13h 12m 44.2575s
Declination (δ) –31° 52 24.056
Distance114.1 ly
(35.00 pc)
Spectral type G3V
Orbital elements
Semi-major axis(a) 2.11±0.12 AU
Periastron (q) 1.76 AU
Apastron (Q) 2.46 AU
Eccentricity (e) 0.167±0.055
Orbital period(P) 1114±15 d
(3.050 y)
Argument of
periastron
(ω) 93±30°
Time of periastron (T0) 2,450,520±67 JD
Semi-amplitude (K) 18.8±1.3 m/s
Physical characteristics
Minimum mass(m sin i)0.95±0.10 MJ
Discovery information
Discovery date 2003
Discoverer(s) Butler, Marcy,
Vogt
Discovery method Radial velocity
Discovery site  United States
Discovery status Published

HD 114729 b is an extrasolar planet[1] approximately 114 light years away in the constellation of Centaurus. This planet is probably slightly less massive than Jupiter. It is an "eccentric Jupiter" meaning that it does not orbit very near the star like the famous 51 Pegasi b but further out and its orbit is very oval-shaped. The mean distance from the star is 2.11 AU, about twice the Earth's distance from the Sun. At periastron, the planet is only 1.43 AU from the star (comparable to the distance of Mars from the Sun), and at apoastron, the orbital distance is 2.72 AU (inner asteroid belt).[2]

References

  1. Butler, R. Paul; et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal. 582 (1): 455–466. Bibcode:2003ApJ...582..455B. doi:10.1086/344570.
  2. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493Freely accessible. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.

External links

Coordinates: 13h 12m 44.2575s, −31° 52′ 24.056″


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