{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-08T00:08:52.742Z","years_from_j2000":26.684,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"epic-201757695-02","name":"EPIC 201757695.02","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1883.87923769191,"distance_method":"NASA Exoplanet Archive sy_dist (del Ser & Fors 2020, 2020MNRAS.498.2778D)","ra_deg":173.9385102,"dec_deg":4.6164303,"epoch_ra_deg":174.284188,"epoch_dec_deg":4.467868,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"EPIC 201757695","semi_major_axis_km":4428096.97272,"periapsis_km":null,"mass_kg":4.1088514930404685e+24,"mass_msun":0.0000020664,"constellation":"Leo","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/epic-201757695-02","radius_km":5792.526639000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"EPIC 201757695","host_v_mag":14.974,"eccentricity":0,"uncertainties":{"radius_km":[408.262181,373.820441],"distance_ly":[97.19460055958955,108.28391740195882],"host_mass_solar":[0.053,0.044],"inclination_deg":[0.3717,0.3689],"host_radius_solar":[0.045,0.041],"host_temperature_k":[54,108],"semi_major_axis_km":[74798.93535,74798.93535],"orbital_period_days":[0.0001,0.0001]},"host_mass_solar":0.727,"inclination_deg":89.2757,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.655,"planets_in_system":1,"discovery_facility":"K2","host_temperature_k":4520,"orbital_period_days":2.0478,"transit_midpoint_bjd":2456811.637,"equilibrium_temperature_k":1025.29},"designations":[{"catalog":"Exoplanet","designation":"EPIC 201757695.02"},{"catalog":"Host star","designation":"EPIC 201757695"}],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}