HD 128311 c

HD 128311 c
Discovery
Discovered byVogt et al.
Discovery siteUnited States California, United States
Discovery dateJune 24, 2005
Doppler spectroscopy
Orbital characteristics[1]
Apastron2.02 AU (302,000,000 km)
Periastron1.46 AU (218,000,000 km)
1.740 ± 0.010 AU (260,300,000 ± 1,500,000 km)
Eccentricity0.159±0.006
921.538 ± 1.15 d (2.52303 ± 0.00315 a)
20.7
Inclination55.950±14.553
229.392±14.473
2449565.615±18.01
15.445±6.87
Semi-amplitude74.799±1.497
StarHD 128311
Physical characteristics[1]
Mass3.789+0.924
−0.432 MJ

HD 128311 c is an exoplanet located approximately 54 light-years away in the constellation of Boötes. This planet orbits in an eccentric orbit at 1.74 AU from its star (HD 128311). The planet has a minimum mass of 3.22 MJ,[2] and astrometric observations in 2014 revealed its true mass to be 3.789 MJ.[1]

References

  1. ^ a b c McArthur, Barbara E.; et al. (2014). "Astrometry, Radial Velocity, and Photometry: The HD 128311 System Remixed with Data from HST, HET, and APT". The Astrophysical Journal. 795 (1): 41. Bibcode:2014ApJ...795...41M. doi:10.1088/0004-637X/795/1/41. S2CID 122980723.
  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. S2CID 16509245.


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