{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T13:10:49.238Z","years_from_j2000":26.683,"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-1456-b","name":"Kepler-1456 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1207.796205450427,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":286.9453381,"dec_deg":43.8228023,"epoch_ra_deg":287.151599,"epoch_dec_deg":43.864456,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1456","semi_major_axis_km":16934478.963239998,"periapsis_km":null,"mass_kg":9.256860195076638e+24,"mass_msun":0.00000465541,"constellation":"Lyra","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-1456-b","radius_km":7271.034,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1456","host_v_mag":15.777,"eccentricity":0,"uncertainties":{"radius_km":[956.715,574.029],"distance_ly":[13.052778236224071,13.33653428483764],"host_mass_solar":[0.083,0.049],"host_radius_solar":[0.074,0.035],"host_temperature_k":[85.61,68.4],"orbital_period_days":[0.0001854,0.0001854]},"host_mass_solar":0.64,"inclination_deg":86.12,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.62,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":4231,"orbital_period_days":18.1373829,"transit_midpoint_bjd":2454969.80802,"equilibrium_temperature_k":433},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1456 b"},{"catalog":"Host star","designation":"Kepler-1456"}],"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."}