{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T10:59:57.344Z","years_from_j2000":26.672,"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-111-c","name":"Kepler-111 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2143.5747303213125,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":291.653163,"dec_deg":44.6882613,"epoch_ra_deg":291.858902,"epoch_dec_deg":44.741538,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-111","semi_major_axis_km":112348000.8957,"periapsis_km":null,"mass_kg":1.3286872198297045e+27,"mass_msun":0.000668216,"constellation":"Cygnus","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-111-c","radius_km":45182.943859980005,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-111","host_v_mag":13.543,"eccentricity":0.176,"uncertainties":{"mass_kg":[2.4675619796837367e+26,2.657374439659409e+26],"radius_km":[1501.331965879,1644.3160203360003],"distance_ly":[19.269318795505203,19.61504455588495],"eccentricity":[0.085,0.08],"host_mass_solar":[0.068,0.061],"inclination_deg":[0.02,0.018],"host_radius_solar":[0.037,0.04],"host_temperature_k":[82,81],"semi_major_axis_km":[2393565.9312,1944772.3190999997],"orbital_period_days":[0.00026,0.00026],"argument_of_periastron_deg":[19,30]},"host_mass_solar":1.118,"inclination_deg":89.756,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.145,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":5914,"orbital_period_days":224.77833,"periastron_epoch_bjd":2454818,"transit_midpoint_bjd":2454975.09611,"equilibrium_temperature_k":352.2,"argument_of_periastron_deg":-141},"designations":[{"catalog":"Exoplanet","designation":"Kepler-111 c"},{"catalog":"Host star","designation":"Kepler-111"}],"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."}