{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T06:15:34.582Z","years_from_j2000":26.671,"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-433-b","name":"Kepler-433 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":6126.227858291363,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":297.5936232,"dec_deg":40.9772546,"epoch_ra_deg":297.821644,"epoch_dec_deg":41.044725,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-433","semi_major_axis_km":10157695.420529999,"periapsis_km":null,"mass_kg":5.352495729829346e+27,"mass_msun":0.00269185,"constellation":"Cygnus","discovered":"2015","featured":false,"url":"https://spacecatalog.org/object/kepler-433-b","radius_km":103644.125,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-433","host_v_mag":14.717,"eccentricity":0.119,"uncertainties":{"mass_kg":[9.869604618312033e+26,9.869604618312033e+26],"radius_km":[11416.799,11416.799],"distance_ly":[235.06090142045696,254.20628079242982],"eccentricity":[0.079,0.079],"host_mass_solar":[0.17,0.17],"inclination_deg":[0.9,0.52],"host_radius_solar":[0.25,0.25],"host_temperature_k":[140,140],"semi_major_axis_km":[403914.25088999997,403914.25088999997],"orbital_period_days":[0.0000011,0.0000011],"argument_of_periastron_deg":[36,67]},"host_mass_solar":1.46,"inclination_deg":89.21,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.26,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":6360,"orbital_period_days":5.33408384,"transit_midpoint_bjd":2454964.98152,"equilibrium_temperature_k":1776,"argument_of_periastron_deg":68},"designations":[{"catalog":"Exoplanet","designation":"Kepler-433 b"},{"catalog":"Host star","designation":"Kepler-433"}],"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."}