{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-09-01T01:04:09.974Z","years_from_j2000":26.665,"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-85-c","name":"Kepler-85 c","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2495.177828627516,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":290.9734395,"dec_deg":45.2902761,"epoch_ra_deg":291.175563,"epoch_dec_deg":45.341854,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-85","semi_major_axis_km":15502827.340641,"periapsis_km":null,"mass_kg":1.2840160915751464e+25,"mass_msun":0.0000064575,"constellation":"Cygnus","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/kepler-85-c","radius_km":12615.881800000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-85","host_v_mag":14.89,"eccentricity":0.027,"uncertainties":{"mass_kg":[3.4041356846410856e+24,4.359682543487707e+24],"radius_km":[363.55170000000004,357.1736],"distance_ly":[43.11461157037631,44.627977162982],"eccentricity":[0.014,0.028],"host_mass_solar":[0.044,0.044],"host_radius_solar":[0.021,0.021],"host_temperature_k":[89.4,89.4],"semi_major_axis_km":[88262.743713,88262.743713]},"host_mass_solar":0.928,"inclination_deg":88.14,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.875,"planets_in_system":4,"discovery_facility":"Kepler","host_temperature_k":5505.2,"orbital_period_days":12.51,"transit_midpoint_bjd":2454972.41628,"equilibrium_temperature_k":706},"designations":[{"catalog":"Exoplanet","designation":"Kepler-85 c"},{"catalog":"Host star","designation":"Kepler-85"}],"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":"2026-08-30T09:56:50.739Z","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."}