{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T19:43:18.846Z","years_from_j2000":26.676,"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-105-c","name":"Kepler-105 c","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1497.7851024421607,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":287.8872376,"dec_deg":46.2761224,"epoch_ra_deg":288.081806,"epoch_dec_deg":46.320111,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-105","semi_major_axis_km":10814430.072902998,"periapsis_km":null,"mass_kg":3.3444140059631724e+25,"mass_msun":0.0000168195,"constellation":"Lyra","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-105-c","radius_km":9184.464,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-105","host_v_mag":12.981,"eccentricity":0.02,"uncertainties":{"mass_kg":[7.166601441349655e+24,7.166601441349655e+24],"radius_km":[255.12400000000002,255.12400000000002],"distance_ly":[17.583090322709637,17.994047358632734],"eccentricity":[0.02,0.02],"host_mass_solar":[0.033,0.032],"host_radius_solar":[0.024,0.025],"host_temperature_k":[60,60],"semi_major_axis_km":[121174.27526699999,121174.27526699999],"orbital_period_days":[0.00001,0.00001],"argument_of_periastron_deg":[59.5,135.7]},"host_mass_solar":0.991,"inclination_deg":84.02,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.026,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":5933,"orbital_period_days":7.12592,"transit_midpoint_bjd":2454957.753,"equilibrium_temperature_k":997,"argument_of_periastron_deg":298.9},"designations":[{"catalog":"Exoplanet","designation":"Kepler-105 c"}],"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."}