{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T07:00:58.195Z","years_from_j2000":26.683,"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-364-c","name":"Kepler-364 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":2907.560167921235,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":281.5699998,"dec_deg":47.3986233,"epoch_ra_deg":281.754365,"epoch_dec_deg":47.426607,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-364","semi_major_axis_km":46674535.6584,"periapsis_km":null,"mass_kg":3.1473324663260565e+25,"mass_msun":0.0000158284,"constellation":"Lyra","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-364-c","radius_km":13712.915,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-364","host_v_mag":13.754,"eccentricity":0,"uncertainties":{"radius_km":[2678.802,2678.802],"distance_ly":[32.26991201129459,32.26991201129459],"host_mass_solar":[0.03,0.03],"host_radius_solar":[0.249,0.249],"host_temperature_k":[125,125],"orbital_period_days":[0.000879,0.000879]},"host_mass_solar":1.076,"inclination_deg":88.03,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.284,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":6108,"orbital_period_days":59.980627,"transit_midpoint_bjd":2455009.15025,"equilibrium_temperature_k":568},"designations":[{"catalog":"Exoplanet","designation":"Kepler-364 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."}