{"id":2921690,"slug":"k2-138-8949349","name":"K2-138","domain":"deep-sky","class":"star","otype":"*","otype_label":"Star","ra":348.9490358616,"dec":-10.84969318369,"coo_err_mas":0.0128,"coo_bibcode":"2020yCat.1350....0G","plx_mas":4.9437,"pmra":-1.08,"pmdec":-10.675,"rv_kms":1.17,"redshift":3.9027077e-06,"dist_pc":null,"vmag":12.21,"bmag":13.01,"gmag":12.022232,"jmag":10.756,"kmag":10.305,"sp_type":null,"morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":79,"simbad_oid":8949349,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":null,"host_object_id":null,"depth":0,"deep_at":null,"views":3,"first_seen":"2026-08-14T16:52:44.329810+00:00","updated_at":"2026-09-13T03:31:46.301398+00:00","identifiers":["K2-138"],"measurements":[{"parameter":"effective_temperature","value":5354.7,"value_text":null,"unit":"K","err_plus":27.9,"err_minus":21.2,"band":null,"method":null,"source":"nasa-exo","reference":"Vivien et al. 2024","ref_year":2024},{"parameter":"effective_temperature","value":5283.0,"value_text":null,"unit":"K","err_plus":122.0,"err_minus":163.0,"band":null,"method":null,"source":"nasa-exo","reference":"Hardegree-Ullman et al. 2021","ref_year":2021},{"parameter":"effective_temperature","value":5356.3,"value_text":null,"unit":"K","err_plus":41.8,"err_minus":13.1,"band":null,"method":null,"source":"nasa-exo","reference":"Lopez et al. 2019","ref_year":2019},{"parameter":"effective_temperature","value":5378.0,"value_text":null,"unit":"K","err_plus":60.0,"err_minus":60.0,"band":null,"method":null,"source":"nasa-exo","reference":"Christiansen et al. 2018","ref_year":2018},{"parameter":"effective_temperature","value":5281.0,"value_text":null,"unit":"K","err_plus":128.8,"err_minus":128.8,"band":null,"method":null,"source":"nasa-exo","reference":"ExoFOP","ref_year":2017},{"parameter":"mass","value":0.891,"value_text":null,"unit":"M_sun","err_plus":0.017,"err_minus":0.027,"band":null,"method":null,"source":"nasa-exo","reference":"Vivien et al. 2024","ref_year":2024},{"parameter":"mass","value":0.916,"value_text":null,"unit":"M_sun","err_plus":0.078,"err_minus":0.096,"band":null,"method":null,"source":"nasa-exo","reference":"Hardegree-Ullman et al. 2021","ref_year":2021},{"parameter":"mass","value":0.935,"value_text":null,"unit":"M_sun","err_plus":0.019,"err_minus":0.023,"band":null,"method":null,"source":"nasa-exo","reference":"Lopez et al. 2019","ref_year":2019},{"parameter":"mass","value":0.93,"value_text":null,"unit":"M_sun","err_plus":0.06,"err_minus":0.06,"band":null,"method":null,"source":"nasa-exo","reference":"Christiansen et al. 2018","ref_year":2018},{"parameter":"radius","value":0.834,"value_text":null,"unit":"R_sun","err_plus":0.011,"err_minus":0.01,"band":null,"method":null,"source":"nasa-exo","reference":"Vivien et al. 2024","ref_year":2024},{"parameter":"radius","value":0.839,"value_text":null,"unit":"R_sun","err_plus":0.054,"err_minus":0.051,"band":null,"method":null,"source":"nasa-exo","reference":"Hardegree-Ullman et al. 2021","ref_year":2021},{"parameter":"radius","value":0.863,"value_text":null,"unit":"R_sun","err_plus":0.031,"err_minus":0.018,"band":null,"method":null,"source":"nasa-exo","reference":"Lopez et al. 2019","ref_year":2019},{"parameter":"radius","value":0.86,"value_text":null,"unit":"R_sun","err_plus":0.08,"err_minus":0.08,"band":null,"method":null,"source":"nasa-exo","reference":"Christiansen et al. 2018","ref_year":2018},{"parameter":"radius","value":0.86,"value_text":null,"unit":"R_sun","err_plus":0.05,"err_minus":0.05,"band":null,"method":null,"source":"nasa-exo","reference":"ExoFOP","ref_year":2017}],"orbit":null,"exoplanet":null,"sources":[]}