{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T10:11:05.189Z","years_from_j2000":26.672,"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-773-b","name":"Kepler-773 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1784.1601867687928,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":290.8846217,"dec_deg":38.0575539,"epoch_ra_deg":291.118661,"epoch_dec_deg":38.108986,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-773","semi_major_axis_km":7004172.306174,"periapsis_km":null,"mass_kg":1.5706801492291326e+25,"mass_msun":0.00000789918,"constellation":"Lyra","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-773-b","radius_km":9120.683,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-773","host_v_mag":13.387,"eccentricity":0,"uncertainties":{"radius_km":[446.46700000000004,574.029],"distance_ly":[13.835553542744256,14.050816752037306],"host_mass_solar":[0.034,0.035],"host_radius_solar":[0.044,0.053],"host_temperature_k":[65.3,76.73],"semi_major_axis_km":[79286.87147099999,79286.87147099999],"orbital_period_days":[0.000007141,0.000007141]},"host_mass_solar":1.04,"inclination_deg":80.24,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.01,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5850,"orbital_period_days":3.749100061,"transit_midpoint_bjd":2454968.10921,"equilibrium_temperature_k":1160},"designations":[{"catalog":"Exoplanet","designation":"Kepler-773 b"},{"catalog":"Host star","designation":"Kepler-773"}],"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."}