{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T01:52:10.328Z","years_from_j2000":26.666,"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-83-b","name":"Kepler-83 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":1305.959490451835,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":282.2325197,"dec_deg":43.6655662,"epoch_ra_deg":282.436589,"epoch_dec_deg":43.695227,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"Kepler-83","semi_major_axis_km":10913164.667565,"periapsis_km":null,"mass_kg":1.7558173531306655e+25,"mass_msun":0.00000883026,"constellation":"Lyra","discovered":"2012","featured":false,"url":"https://spacecatalog.org/object/kepler-83-b","radius_km":18050.023,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"Kepler-83","host_v_mag":16.145,"eccentricity":0,"uncertainties":{"mass_kg":[3.702744078030655e+24,5.255507723656414e+24],"radius_km":[2615.021,2615.021],"distance_ly":[16.806838143743786,16.806838143743786],"host_mass_solar":[0.25,0.41],"host_radius_solar":[0.03,0.03],"host_temperature_k":[37.69,39.2],"semi_major_axis_km":[424857.952788,424857.952788]},"host_mass_solar":0.66,"inclination_deg":89.84,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.61,"planets_in_system":3,"discovery_facility":"Kepler","host_spectral_type":"M0 V","host_temperature_k":4082,"orbital_period_days":9.77,"transit_midpoint_bjd":2455008.71348,"equilibrium_temperature_k":460},"designations":[{"catalog":"Exoplanet","designation":"Kepler-83 b"},{"catalog":"Host star","designation":"Kepler-83"}],"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":"2026-08-30T09:56:50.739Z","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."}