{"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":"2026-09-06T04:20:01.182Z","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-1216-b","name":"Kepler-1216 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":4104.221394636412,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":287.4052661,"dec_deg":45.917979,"epoch_ra_deg":287.601362,"epoch_dec_deg":45.960774,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-1216","semi_major_axis_km":7764129.489329999,"periapsis_km":null,"mass_kg":1.499014134815636e+25,"mass_msun":0.00000753876,"constellation":"Lyra","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/kepler-1216-b","radius_km":8865.559,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-1216","host_v_mag":15.262,"eccentricity":0,"uncertainties":{"radius_km":[701.591,1403.182],"distance_ly":[131.93025478642272,140.80170826031815],"host_mass_solar":[0.046,0.042],"host_radius_solar":[0.074,0.147],"host_temperature_k":[77.97,73.65],"orbital_period_days":[0.00001993,0.00001993]},"host_mass_solar":0.99,"inclination_deg":89.55,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.98,"planets_in_system":1,"discovery_facility":"Kepler","host_temperature_k":5743,"orbital_period_days":4.37034536,"transit_midpoint_bjd":2454964.92397,"equilibrium_temperature_k":1191},"designations":[{"catalog":"Exoplanet","designation":"Kepler-1216 b"},{"catalog":"Host star","designation":"Kepler-1216"}],"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."}