{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T09:07:42.579Z","years_from_j2000":26.686,"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-201170410-02","name":"EPIC 201170410.02","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":437.0495461404362,"distance_method":"NASA Exoplanet Archive sy_dist (del Ser & Fors 2020, 2020MNRAS.498.2778D)","ra_deg":170.1408561,"dec_deg":-4.8070039,"epoch_ra_deg":170.482802,"epoch_dec_deg":-4.954076,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"EPIC 201170410","semi_major_axis_km":5220965.68743,"periapsis_km":null,"mass_kg":6.867993047960086e+24,"mass_msun":0.00000345401,"constellation":"Leo","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/epic-201170410-02","radius_km":6677.8706999999995,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"EPIC 201170410","host_v_mag":17.6984,"eccentricity":0,"uncertainties":{"radius_km":[1639.1717,1760.3556000000003],"distance_ly":[129.81023833126386,149.37962099426846],"host_mass_solar":[0.084,0.101],"inclination_deg":[0.2885,0.4142],"host_radius_solar":[0.069,0.074],"host_temperature_k":[143,172],"semi_major_axis_km":[329115.31554,403914.25088999997],"orbital_period_days":[0.0001,0.0001]},"host_mass_solar":0.287,"inclination_deg":89.0025,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.282,"planets_in_system":1,"discovery_facility":"K2","host_temperature_k":3648,"orbital_period_days":6.7987,"transit_midpoint_bjd":2456813.1485,"equilibrium_temperature_k":500.03},"designations":[{"catalog":"Exoplanet","designation":"EPIC 201170410.02"},{"catalog":"Host star","designation":"EPIC 201170410"}],"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."}