{"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":"2026-09-03T16:03:15.380Z","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-625-c","name":"Kepler-625 c","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2481.0976578014843,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":292.1504723,"dec_deg":39.6375254,"epoch_ra_deg":292.379094,"epoch_dec_deg":39.692043,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-625","semi_major_axis_km":8046869.464952999,"periapsis_km":null,"mass_kg":6.927714726638e+24,"mass_msun":0.00000348405,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-625-c","radius_km":6697.005000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-625","host_v_mag":13.395,"eccentricity":0,"uncertainties":{"radius_km":[191.34300000000002,318.90500000000003],"distance_ly":[31.1772881459435,31.96332501624086],"host_mass_solar":[0.02,0.024],"host_radius_solar":[0.02,0.025],"host_temperature_k":[43.94,46.81],"semi_major_axis_km":[56847.190866,56847.190866],"orbital_period_days":[0.00001304,0.00001304]},"host_mass_solar":1.04,"inclination_deg":87.83,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.96,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":5789,"orbital_period_days":4.1653651,"transit_midpoint_bjd":2454965.04209,"equilibrium_temperature_k":1048},"designations":[{"catalog":"Exoplanet","designation":"Kepler-625 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."}