{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T23:19:38.028Z","years_from_j2000":26.676,"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-328-b","name":"Kepler-328 b","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":7218.4603359891935,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":295.8092756,"dec_deg":40.0084866,"epoch_ra_deg":296.039559,"epoch_dec_deg":40.071797,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-328","semi_major_axis_km":32896571.76693,"periapsis_km":null,"mass_kg":1.702067842320543e+26,"mass_msun":0.0000855994,"constellation":"Cygnus","discovered":"2013","featured":false,"url":"https://spacecatalog.org/object/kepler-328-b","radius_km":14669.63,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-328","host_v_mag":15.794,"eccentricity":0,"uncertainties":{"mass_kg":[7.345766477383397e+25,7.704096549450879e+25],"radius_km":[1466.9630000000002,6122.976000000001],"distance_ly":[462.6528217912005,529.1887228454162],"host_mass_solar":[0.16,0.22],"host_radius_solar":[0.11,0.44],"host_temperature_k":[123,123]},"host_mass_solar":1.15,"inclination_deg":89.96,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.06,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":6064,"orbital_period_days":34.921,"transit_midpoint_bjd":2454990.6317,"equilibrium_temperature_k":602},"designations":[{"catalog":"Exoplanet","designation":"Kepler-328 b"},{"catalog":"Host star","designation":"Kepler-328"}],"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."}