HD 128311 b

HD 128311 b is an exoplanet[1] located approximately 54 light-years away in the constellation of Boötes. This planet orbits in an eccentric orbit about 1.1 AU from its star (HD 128311). The planet has minimum mass 2.19 Jupiter masses.[2]

HD 128311 b
Discovery
Discovered byButler et al.
Discovery site California, United States
Discovery date2002
Doppler Spectroscopy
Orbital characteristics
Apastron1.380 AU (206,400,000 km)
Periastron0.820 AU (122,700,000 km)
1.100 ± 0.065 AU (164,600,000 ± 9,700,000 km)
Eccentricity0.25 ± 0.10
458.6 ± 6.8 d
1.256 y
26.2
2,450,211 ± 76
111° ± 36°
Semi-amplitude66.8 ± 8.7
StarHD 128311

    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. CiteSeerX 10.1.1.7.6988. doi:10.1086/344570.
    2. Vogt, Steven S.; et al. (2005). "Five New Multicomponent Planetary Systems" (PDF). The Astrophysical Journal. 632 (1): 638–658. Bibcode:2005ApJ...632..638V. doi:10.1086/432901.


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