{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T20:12:10.024Z","years_from_j2000":26.673,"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-107-c","name":"Kepler-107 c","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1715.5727620987386,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":297.028162,"dec_deg":48.2086019,"epoch_ra_deg":297.222025,"epoch_dec_deg":48.274722,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-107","semi_major_axis_km":9071614.879247999,"periapsis_km":null,"mass_kg":5.972167867791379e+25,"mass_msun":0.0000300349,"constellation":"Cygnus","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-107-c","radius_km":10185.825700000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-107","host_v_mag":12.543,"uncertainties":{"mass_kg":[1.1944335735582758e+25,1.1944335735582758e+25],"radius_km":[165.8306,165.8306],"distance_ly":[18.18974118526278,18.581128838522872],"host_mass_solar":[0.029,0.029],"inclination_deg":[0.44,0.34],"host_radius_solar":[0.014,0.014],"host_temperature_k":[61,61],"semi_major_axis_km":[71806.977936,71806.977936]},"host_mass_solar":1.238,"inclination_deg":89.49,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.447,"planets_in_system":4,"discovery_facility":"Kepler","host_temperature_k":5854,"orbital_period_days":4.901452,"transit_midpoint_bjd":2455697.01829,"eccentricity_upper_limit":0.08,"equilibrium_temperature_k":1378},"designations":[{"catalog":"Exoplanet","designation":"Kepler-107 c"}],"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."}