{"id":2800074,"slug":"kepler-521-7822043","name":"Kepler-521","domain":"deep-sky","class":"star","otype":"Er*","otype_label":"Eruptive*","ra":298.81638640278,"dec":43.99803592486,"coo_err_mas":0.0119,"coo_bibcode":"2020yCat.1350....0G","plx_mas":1.1859,"pmra":-1.054,"pmdec":-3.64,"rv_kms":14.67,"redshift":4.893505e-05,"dist_pc":null,"vmag":13.049,"bmag":13.671,"gmag":12.881743,"jmag":11.915,"kmag":11.67,"sp_type":"F3V","morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":45,"simbad_oid":7822043,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":null,"host_object_id":null,"depth":0,"deep_at":null,"views":2,"first_seen":"2026-08-14T16:52:21.599652+00:00","updated_at":"2026-08-14T16:52:21.599652+00:00","identifiers":["Kepler-521"],"measurements":[{"parameter":"effective_temperature","value":6563.0,"value_text":null,"unit":"K","err_plus":60.0,"err_minus":60.0,"band":null,"method":null,"source":"nasa-exo","reference":"Fulton &amp; Petigura 2018","ref_year":2018},{"parameter":"effective_temperature","value":6563.0,"value_text":null,"unit":"K","err_plus":131.0,"err_minus":131.0,"band":null,"method":null,"source":"nasa-exo","reference":"Berger et al. 2018","ref_year":2018},{"parameter":"effective_temperature","value":6658.0,"value_text":null,"unit":"K","err_plus":126.0,"err_minus":126.0,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q8 KOI Table","ref_year":2016},{"parameter":"effective_temperature","value":6336.0,"value_text":null,"unit":"K","err_plus":113.0,"err_minus":139.0,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q17 DR25 KOI Table","ref_year":2016},{"parameter":"effective_temperature","value":6652.0,"value_text":null,"unit":"K","err_plus":164.0,"err_minus":231.0,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q12 KOI Table","ref_year":2016},{"parameter":"effective_temperature","value":6652.0,"value_text":null,"unit":"K","err_plus":164.0,"err_minus":231.0,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q16 KOI Table","ref_year":2016},{"parameter":"effective_temperature","value":6663.52,"value_text":null,"unit":"K","err_plus":161.32,"err_minus":130.62,"band":null,"method":null,"source":"nasa-exo","reference":"TICv8","ref_year":2016},{"parameter":"effective_temperature","value":6652.0,"value_text":null,"unit":"K","err_plus":164.0,"err_minus":231.0,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q17 DR24 KOI Table","ref_year":2016},{"parameter":"effective_temperature","value":6406.0,"value_text":null,"unit":"K","err_plus":90.67,"err_minus":86.67,"band":null,"method":null,"source":"nasa-exo","reference":"Morton et al. 2016","ref_year":2016},{"parameter":"mass","value":1.355,"value_text":null,"unit":"M_sun","err_plus":0.03,"err_minus":0.019,"band":null,"method":null,"source":"nasa-exo","reference":"Fulton &amp; Petigura 2018","ref_year":2018},{"parameter":"mass","value":1.225,"value_text":null,"unit":"M_sun","err_plus":0.281,"err_minus":0.205,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q12 KOI Table","ref_year":2016},{"parameter":"mass","value":1.41,"value_text":null,"unit":"M_sun","err_plus":0.297102,"err_minus":0.175179,"band":null,"method":null,"source":"nasa-exo","reference":"TICv8","ref_year":2016},{"parameter":"mass","value":1.225,"value_text":null,"unit":"M_sun","err_plus":0.281,"err_minus":0.205,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q17 DR24 KOI Table","ref_year":2016},{"parameter":"mass","value":1.324,"value_text":null,"unit":"M_sun","err_plus":0.092,"err_minus":0.084,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q17 DR25 KOI Table","ref_year":2016},{"parameter":"mass","value":1.225,"value_text":null,"unit":"M_sun","err_plus":0.281,"err_minus":0.205,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q16 KOI Table","ref_year":2016},{"parameter":"mass","value":1.39,"value_text":null,"unit":"M_sun","err_plus":0.17,"err_minus":0.17,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q8 KOI Table","ref_year":2016},{"parameter":"mass","value":1.34,"value_text":null,"unit":"M_sun","err_plus":0.063,"err_minus":0.055,"band":null,"method":null,"source":"nasa-exo","reference":"Morton et al. 2016","ref_year":2016},{"parameter":"radius","value":1.668,"value_text":null,"unit":"R_sun","err_plus":0.077,"err_minus":0.073,"band":null,"method":null,"source":"nasa-exo","reference":"Berger et al. 2018","ref_year":2018},{"parameter":"radius","value":1.632,"value_text":null,"unit":"R_sun","err_plus":0.045,"err_minus":0.043,"band":null,"method":null,"source":"nasa-exo","reference":"Fulton &amp; Petigura 2018","ref_year":2018},{"parameter":"radius","value":1.62494,"value_text":null,"unit":"R_sun","err_plus":0.086428,"err_minus":0.095612,"band":null,"method":null,"source":"nasa-exo","reference":"TICv8","ref_year":2016},{"parameter":"radius","value":1.699,"value_text":null,"unit":"R_sun","err_plus":0.793,"err_minus":0.495,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q17 DR24 KOI Table","ref_year":2016},{"parameter":"radius","value":1.699,"value_text":null,"unit":"R_sun","err_plus":0.793,"err_minus":0.495,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q16 KOI Table","ref_year":2016},{"parameter":"radius","value":1.699,"value_text":null,"unit":"R_sun","err_plus":0.793,"err_minus":0.495,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q12 KOI Table","ref_year":2016},{"parameter":"radius","value":1.82,"value_text":null,"unit":"R_sun","err_plus":0.64,"err_minus":0.64,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q8 KOI Table","ref_year":2016},{"parameter":"radius","value":1.46,"value_text":null,"unit":"R_sun","err_plus":0.143,"err_minus":0.106,"band":null,"method":null,"source":"nasa-exo","reference":"Morton et al. 2016","ref_year":2016},{"parameter":"radius","value":1.403,"value_text":null,"unit":"R_sun","err_plus":0.245,"err_minus":0.132,"band":null,"method":null,"source":"nasa-exo","reference":"Q1-Q17 DR25 KOI Table","ref_year":2016}],"orbit":null,"exoplanet":null,"sources":[]}