{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T17:10:32.475Z","years_from_j2000":26.667,"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":"kepler-36-b","name":"Kepler-36 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1721.96216553821,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":291.2501859,"dec_deg":49.2318073,"epoch_ra_deg":291.431585,"epoch_dec_deg":49.284045,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-36","semi_major_axis_km":17082580.855233,"periapsis_km":null,"mass_kg":2.2873402933640983e+25,"mass_msun":0.0000115034,"constellation":"Cygnus","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/kepler-36-b","radius_km":9554.3938,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-36","host_v_mag":11.941,"eccentricity":0,"uncertainties":{"mass_kg":[5.972167867791379e+23,6.569384654570517e+23],"radius_km":[312.5269,389.0641],"distance_ly":[19.468274185912417,19.911846859607188],"host_mass_solar":[0.022,0.022],"inclination_deg":[0.71,0.69],"host_radius_solar":[0.04,0.042],"host_temperature_k":[60,60],"semi_major_axis_km":[119678.29656,119678.29656],"orbital_period_days":[0.0005,0.0005]},"host_mass_solar":1.034,"inclination_deg":90.01,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.634,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":5979,"orbital_period_days":13.86825,"transit_midpoint_bjd":2454974.6491,"equilibrium_temperature_k":978},"designations":[{"catalog":"Exoplanet","designation":"Kepler-36 b"},{"catalog":"Host star","designation":"Kepler-36"}],"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":"2026-08-30T09:56:50.739Z","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."}