{"id":10349,"slug":"hd-128311-c","name":"HD 128311 c","domain":"exoplanet","class":"exoplanet","otype":null,"otype_label":"Exoplanet","ra":219.0032292,"dec":9.7454368,"coo_err_mas":null,"coo_bibcode":null,"plx_mas":null,"pmra":null,"pmdec":null,"rv_kms":null,"redshift":null,"dist_pc":16.3292,"vmag":7.48,"bmag":null,"gmag":null,"jmag":null,"kmag":null,"sp_type":null,"morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":65,"simbad_oid":3750874,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":"HD 128311 c","host_object_id":2077350,"depth":0,"deep_at":null,"views":3,"first_seen":"2026-08-14T16:25:51.971135+00:00","updated_at":"2026-09-13T03:31:17.289698+00:00","identifiers":["HD 128311c"],"measurements":[{"parameter":"eccentricity","value":0.196,"value_text":null,"unit":null,"err_plus":0.047,"err_minus":0.057,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Rosenthal et al. 2021","ref_year":2021},{"parameter":"eccentricity","value":0.12,"value_text":null,"unit":null,"err_plus":0.08,"err_minus":0.06,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Rein 2015","ref_year":2015},{"parameter":"eccentricity","value":0.159,"value_text":null,"unit":null,"err_plus":0.006,"err_minus":0.006,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"McArthur et al. 2014","ref_year":2014},{"parameter":"eccentricity","value":0.23,"value_text":null,"unit":null,"err_plus":0.058,"err_minus":0.058,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Wittenmyer et al. 2009","ref_year":2009},{"parameter":"eccentricity","value":0.17,"value_text":null,"unit":null,"err_plus":0.09,"err_minus":0.09,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Vogt et al. 2005","ref_year":2005},{"parameter":"mass","value":1032.94232275,"value_text":null,"unit":"M_earth","err_plus":38.13940884,"err_minus":38.13940884,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Rosenthal et al. 2021","ref_year":2021},{"parameter":"mass","value":1017.01,"value_text":null,"unit":"M_earth","err_plus":25.43,"err_minus":25.43,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Rein 2015","ref_year":2015},{"parameter":"mass","value":1204.25787,"value_text":null,"unit":"M_earth","err_plus":293.67492,"err_minus":137.30256,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"McArthur et al. 2014","ref_year":2014},{"parameter":"mass","value":1029.73,"value_text":null,"unit":"M_earth","err_plus":31.78,"err_minus":31.78,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Wittenmyer et al. 2009","ref_year":2009},{"parameter":"mass","value":1020.19,"value_text":null,"unit":"M_earth","err_plus":95.34,"err_minus":95.34,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Vogt et al. 2005","ref_year":2005},{"parameter":"orbital_period","value":917.5,"value_text":null,"unit":"d","err_plus":1.9,"err_minus":1.9,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Rosenthal et al. 2021","ref_year":2021},{"parameter":"orbital_period","value":910.7,"value_text":null,"unit":"d","err_plus":7.6,"err_minus":6.0,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Rein 2015","ref_year":2015},{"parameter":"orbital_period","value":921.538,"value_text":null,"unit":"d","err_plus":1.15,"err_minus":1.15,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"McArthur et al. 2014","ref_year":2014},{"parameter":"orbital_period","value":923.8,"value_text":null,"unit":"d","err_plus":5.3,"err_minus":5.3,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Wittenmyer et al. 2009","ref_year":2009},{"parameter":"orbital_period","value":928.3,"value_text":null,"unit":"d","err_plus":18.0,"err_minus":18.0,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Vogt et al. 2005","ref_year":2005},{"parameter":"semi_major_axis","value":1.742,"value_text":null,"unit":"au","err_plus":0.02,"err_minus":0.02,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Rosenthal et al. 2021","ref_year":2021},{"parameter":"semi_major_axis","value":1.74,"value_text":null,"unit":"au","err_plus":0.01,"err_minus":0.01,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"McArthur et al. 2014","ref_year":2014},{"parameter":"semi_major_axis","value":1.745,"value_text":null,"unit":"au","err_plus":0.017,"err_minus":0.017,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Wittenmyer et al. 2009","ref_year":2009},{"parameter":"semi_major_axis","value":1.76,"value_text":null,"unit":"au","err_plus":0.13,"err_minus":0.13,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Vogt et al. 2005","ref_year":2005}],"orbit":null,"exoplanet":{"object_id":10349,"pl_name":"HD 128311 c","hostname":"HD 128311","sy_pnum":2,"disc_method":"Radial Velocity","disc_year":2005,"disc_facility":"W. M. Keck Observatory","orbper_d":921.538,"orbsmax_au":1.74,"rade":13.0,"radj":1.16,"masse":1204.25787,"massj":3.789,"dens_gcm3":3.01,"eccen":0.159,"insol":0.1017,"eqt_k":158.23,"st_teff":4965.0,"st_rad":0.76,"st_mass":0.828,"st_spectype":"K0","sy_dist_pc":16.3292,"updated_at":"2026-09-13T03:31:17.289698+00:00"},"sources":[]}