{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T00:59:07.317Z","years_from_j2000":26.679,"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-1213-b","name":"Kepler-1213 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2634.7303579611794,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.4858423,"dec_deg":50.9441967,"epoch_ra_deg":289.655268,"epoch_dec_deg":50.992133,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1213","semi_major_axis_km":9014767.688382,"periapsis_km":null,"mass_kg":1.0809623840702397e+25,"mass_msun":0.00000543632,"constellation":"Cygnus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-1213-b","radius_km":7589.939,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1213","host_v_mag":13.416,"eccentricity":0,"uncertainties":{"radius_km":[637.8100000000001,829.153],"distance_ly":[27.309073506222923,27.87658560345006],"host_mass_solar":[0.04,0.045],"host_radius_solar":[0.093,0.128],"host_temperature_k":[81.73,74.56],"semi_major_axis_km":[76294.914057,76294.914057],"orbital_period_days":[0.00002659,0.00002659]},"host_mass_solar":1.14,"inclination_deg":80.06,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.21,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":6050,"orbital_period_days":5.34982412,"transit_midpoint_bjd":2454966.88038,"equilibrium_temperature_k":1156},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1213 b"},{"catalog":"Host star","designation":"Kepler-1213"}],"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."}