{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-02T01:56:36.579Z","years_from_j2000":26.668,"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-5-b","name":"Kepler-5 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2934.6800707283824,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":299.4070341,"dec_deg":44.0350387,"epoch_ra_deg":299.624012,"epoch_dec_deg":44.106665,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-5","semi_major_axis_km":8048365.443659999,"periapsis_km":null,"mass_kg":4.006961113429903e+27,"mass_msun":0.00201516,"constellation":"Cygnus","discovered":"2009","featured":false,"url":"https://spacecatalog.org/object/kepler-5-b","radius_km":101947.7672554,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-5","host_v_mag":13.325,"eccentricity":0,"uncertainties":{"mass_kg":[1.632395337541315e+26,1.2717498559914897e+26],"radius_km":[3646.0982679000003,2573.7164244],"distance_ly":[52.77536347834626,54.709470798206546],"host_mass_solar":[0.059,0.04],"inclination_deg":[0.32,0.44],"host_radius_solar":[0.062,0.043],"host_temperature_k":[60,60],"semi_major_axis_km":[314155.52846999996,224396.80604999998],"orbital_period_days":[7e-7,7e-7]},"host_mass_solar":1.374,"inclination_deg":89.14,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.793,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":6297,"orbital_period_days":3.5484657,"transit_midpoint_bjd":2454955.90144,"equilibrium_temperature_k":1750},"designations":[{"catalog":"Exoplanet","designation":"Kepler-5 b"},{"catalog":"Host star","designation":"Kepler-5"}],"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":"2026-09-01T22:58:55.274Z","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."}