{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-02T00:27:37.494Z","years_from_j2000":26.668,"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-19-c","name":"Kepler-19 c","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":712.8539022652687,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":290.4209694,"dec_deg":37.8516556,"epoch_ra_deg":290.655465,"epoch_dec_deg":37.90193,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-19","semi_major_axis_km":26415049.481781438,"periapsis_km":null,"mass_kg":7.823539906806707e+25,"mass_msun":0.0000393457,"constellation":"Lyra","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/kepler-19-c","radius_km":23471.408000000003,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-19","host_v_mag":12.035,"eccentricity":0.21,"uncertainties":{"mass_kg":[1.6124853243036724e+25,1.6124853243036724e+25],"distance_ly":[3.1506706087437415,3.180024682738248],"eccentricity":[0.07,0.05],"host_mass_solar":[0.04,0.04],"host_radius_solar":[0.018,0.018],"host_temperature_k":[20,20],"orbital_period_days":[0.005,0.012],"argument_of_periastron_deg":[6.8,11.1]},"host_mass_solar":0.936,"stars_in_system":1,"discovery_method":"Transit Timing Variations","host_radius_solar":0.859,"planets_in_system":3,"discovery_facility":"Kepler","host_temperature_k":5544,"orbital_period_days":28.731,"equilibrium_temperature_k":589.64,"argument_of_periastron_deg":23.8},"designations":[{"catalog":"Exoplanet","designation":"Kepler-19 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":"2026-09-01T22:58:55.274Z","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."}