{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T18:02:19.318Z","years_from_j2000":26.67,"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-327-c","name":"Kepler-327 c","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":789.2560337454158,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":292.6422963,"dec_deg":44.0876251,"epoch_ra_deg":292.851794,"epoch_dec_deg":44.143299,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-327","semi_major_axis_km":7031099.9229,"periapsis_km":null,"mass_kg":1.21235007716165e+26,"mass_msun":0.0000609708,"constellation":"Cygnus","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/kepler-327-c","radius_km":6569.443,"radius_kind":null,"data_quality":"The published mass and radius imply a density no material has. One of the two is likely an upper limit rather than a measurement.","description":null,"properties":{"host_star":"Kepler-327","host_v_mag":15.611,"eccentricity":0,"uncertainties":{"mass_kg":[1.057073712599074e+26,1.618457492171464e+26],"radius_km":[318.90500000000003,318.90500000000003],"distance_ly":[4.791237188658961,4.791237188658961],"host_mass_solar":[0.020356,0.020356],"host_radius_solar":[0.016,0.016],"host_temperature_k":[100,100],"orbital_period_days":[0.000019,0.000019]},"host_mass_solar":0.591913,"inclination_deg":89.44,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.492,"planets_in_system":3,"discovery_facility":"Kepler","host_temperature_k":3799,"orbital_period_days":5.212333,"transit_midpoint_bjd":2454965.70664,"equilibrium_temperature_k":537},"designations":[{"catalog":"Exoplanet","designation":"Kepler-327 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."}