{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T05:30:53.505Z","years_from_j2000":26.68,"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-80-g","name":"Kepler-80 g","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1204.9879990382858,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":296.1125759,"dec_deg":39.9787451,"epoch_ra_deg":296.343306,"epoch_dec_deg":40.042784,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-80","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":3.8819091140643965e+23,"mass_msun":1.95227e-7,"constellation":"Cygnus","discovered":"2017","featured":false,"url":"https://spacecatalog.org/object/kepler-80-g","radius_km":7207.253,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-80","host_v_mag":15.23,"eccentricity":0.1303,"uncertainties":{"mass_kg":[2.2694237897607242e+23,2.6277538618282067e+23],"radius_km":[892.9340000000001,892.9340000000001],"distance_ly":[9.440596353011138,9.440596353011138],"eccentricity":[0.0037,0.0034],"host_mass_solar":[0.03,0.03],"inclination_deg":[0.98,0.47],"host_radius_solar":[0.023,0.023],"host_temperature_k":[100,100],"orbital_period_days":[0.00012,0.00012],"argument_of_periastron_deg":[55,72]},"host_mass_solar":0.83,"inclination_deg":89.35,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.678,"planets_in_system":6,"discovery_facility":"Kepler","host_spectral_type":"K5","host_temperature_k":4540,"orbital_period_days":14.64558,"transit_midpoint_bjd":2455658.6073,"equilibrium_temperature_k":418,"argument_of_periastron_deg":153},"designations":[{"catalog":"Exoplanet","designation":"Kepler-80 g"}],"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."}