{"id":7808,"slug":"hd-21520-b","name":"HD 21520 b","domain":"exoplanet","class":"exoplanet","otype":null,"otype_label":"Exoplanet","ra":51.6403449,"dec":-43.6136649,"coo_err_mas":null,"coo_bibcode":null,"plx_mas":null,"pmra":null,"pmdec":null,"rv_kms":null,"redshift":null,"dist_pc":79.208,"vmag":9.17,"bmag":null,"gmag":null,"jmag":null,"kmag":null,"sp_type":null,"morph_type":null,"size_maj":null,"size_min":null,"size_angle":null,"nbref":0,"simbad_oid":null,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":"HD 21520 b","host_object_id":2236648,"depth":0,"deep_at":null,"views":1,"first_seen":"2026-08-14T16:25:51.971135+00:00","updated_at":"2026-10-18T03:30:41.791363+00:00","identifiers":[],"measurements":[{"parameter":"eccentricity","value":0.0,"value_text":null,"unit":null,"err_plus":null,"err_minus":null,"band":null,"method":"Transit","source":"nasa-exo","reference":"Nies et al. 2024","ref_year":2024},{"parameter":"equilibrium_temperature","value":627.0,"value_text":null,"unit":"K","err_plus":null,"err_minus":null,"band":null,"method":"Transit","source":"nasa-exo","reference":"ExoFOP","ref_year":2024},{"parameter":"equilibrium_temperature","value":637.0,"value_text":null,"unit":"K","err_plus":13.0,"err_minus":12.0,"band":null,"method":"Transit","source":"nasa-exo","reference":"Nies et al. 2024","ref_year":2024},{"parameter":"mass","value":17.7,"value_text":null,"unit":"M_earth","err_plus":null,"err_minus":null,"band":null,"method":"Transit","source":"nasa-exo","reference":"Nies et al. 2024","ref_year":2024},{"parameter":"orbital_period","value":25.1292,"value_text":null,"unit":"d","err_plus":8.9e-05,"err_minus":7.3e-05,"band":null,"method":"Transit","source":"nasa-exo","reference":"Nies et al. 2024","ref_year":2024},{"parameter":"orbital_period","value":25.1290153,"value_text":null,"unit":"d","err_plus":0.0004454,"err_minus":0.0004454,"band":null,"method":"Transit","source":"nasa-exo","reference":"ExoFOP","ref_year":2024},{"parameter":"radius","value":1.93226,"value_text":null,"unit":"R_earth","err_plus":0.137194,"err_minus":0.137194,"band":null,"method":"Transit","source":"nasa-exo","reference":"ExoFOP","ref_year":2024},{"parameter":"radius","value":2.697,"value_text":null,"unit":"R_earth","err_plus":0.09,"err_minus":0.09,"band":null,"method":"Transit","source":"nasa-exo","reference":"Nies et al. 2024","ref_year":2024},{"parameter":"semi_major_axis","value":0.1726,"value_text":null,"unit":"au","err_plus":0.0071,"err_minus":0.0071,"band":null,"method":"Transit","source":"nasa-exo","reference":"Nies et al. 2024","ref_year":2024}],"orbit":null,"exoplanet":{"object_id":7808,"pl_name":"HD 21520 b","hostname":"HD 21520","sy_pnum":1,"disc_method":"Transit","disc_year":2024,"disc_facility":"Transiting Exoplanet Survey Satellite (TESS)","orbper_d":25.1292,"orbsmax_au":0.1726,"rade":2.697,"radj":0.24061064,"masse":17.7,"massj":0.05569043,"dens_gcm3":1.35,"eccen":0.0,"insol":25.7431,"eqt_k":637.0,"st_teff":5871.0,"st_rad":1.044,"st_mass":1.09,"st_spectype":null,"sy_dist_pc":79.208,"updated_at":"2026-10-18T03:30:41.791363+00:00"},"sources":[]}