{"id":9274,"slug":"hd-20781-b","name":"HD 20781 b","domain":"exoplanet","class":"exoplanet","otype":null,"otype_label":"Exoplanet","ra":50.0139757,"dec":-28.7841175,"coo_err_mas":null,"coo_bibcode":null,"plx_mas":null,"pmra":null,"pmdec":null,"rv_kms":null,"redshift":null,"dist_pc":35.9715,"vmag":8.48,"bmag":null,"gmag":null,"jmag":null,"kmag":null,"sp_type":null,"morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":12,"simbad_oid":6198509,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":"HD 20781 b","host_object_id":1717687,"depth":0,"deep_at":null,"views":2,"first_seen":"2026-08-14T16:25:51.971135+00:00","updated_at":"2026-09-13T03:31:17.289698+00:00","identifiers":["HD 20781b"],"measurements":[{"parameter":"eccentricity","value":0.1,"value_text":null,"unit":null,"err_plus":0.11,"err_minus":0.07,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Udry et al. 2019","ref_year":2019},{"parameter":"mass","value":1.93,"value_text":null,"unit":"M_earth","err_plus":0.39,"err_minus":0.36,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Udry et al. 2019","ref_year":2019},{"parameter":"orbital_period","value":5.3135,"value_text":null,"unit":"d","err_plus":0.001,"err_minus":0.001,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Udry et al. 2019","ref_year":2019},{"parameter":"semi_major_axis","value":0.0529,"value_text":null,"unit":"au","err_plus":0.0024,"err_minus":0.0027,"band":null,"method":"Radial Velocity","source":"nasa-exo","reference":"Udry et al. 2019","ref_year":2019}],"orbit":null,"exoplanet":{"object_id":9274,"pl_name":"HD 20781 b","hostname":"HD 20781","sy_pnum":5,"disc_method":"Radial Velocity","disc_year":2019,"disc_facility":"La Silla Observatory","orbper_d":5.3135,"orbsmax_au":0.0529,"rade":1.21,"radj":0.108,"masse":1.93,"massj":0.0061,"dens_gcm3":5.99,"eccen":0.1,"insol":175.0994,"eqt_k":1006.1,"st_teff":5256.0,"st_rad":0.833609,"st_mass":0.7,"st_spectype":"K0 V","sy_dist_pc":35.9715,"updated_at":"2026-09-13T03:31:17.289698+00:00"},"sources":[]}