{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T21:23:10.627Z","years_from_j2000":26.673,"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-68-b","name":"Kepler-68 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":470.2066034991203,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":291.0323102,"dec_deg":49.0402129,"epoch_ra_deg":291.214629,"epoch_dec_deg":49.09195,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-68","semi_major_axis_km":9177829.367445,"periapsis_km":null,"mass_kg":4.795650797836477e+25,"mass_msun":0.000024118,"constellation":"Cygnus","discovered":"2013","featured":false,"url":"https://spacecatalog.org/object/kepler-68-b","radius_km":15033.181700000003,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-68","host_v_mag":10.077,"uncertainties":{"mass_kg":[4.001352471420224e+24,4.001352471420224e+24],"radius_km":[146.6963,146.6963],"distance_ly":[1.4155186792906664,1.4220418068450014],"host_mass_solar":[0.02,0.022],"inclination_deg":[0.17,0.22],"host_radius_solar":[0.0084,0.0084],"host_temperature_k":[75,75],"semi_major_axis_km":[64327.08440099999,64327.08440099999],"orbital_period_days":[5.2e-7,5.2e-7]},"host_mass_solar":1.057,"inclination_deg":87.23,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.2564,"planets_in_system":4,"discovery_facility":"Kepler","host_temperature_k":5847,"orbital_period_days":5.39875259,"transit_midpoint_bjd":2455006.85878,"eccentricity_upper_limit":0.09,"equilibrium_temperature_k":1275,"argument_of_periastron_deg":0},"designations":[{"catalog":"Exoplanet","designation":"Kepler-68 b"}],"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."}