{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T01:19:31.425Z","years_from_j2000":26.682,"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":"koi-1783-02","name":"KOI-1783.02","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":2823.633608807163,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.3414629,"dec_deg":46.988155,"epoch_ra_deg":289.533561,"epoch_dec_deg":47.035763,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"KOI-1783","semi_major_axis_km":129693874.003365,"periapsis_km":null,"mass_kg":8.95825180168707e+25,"mass_msun":0.0000450523,"constellation":"Cygnus","discovered":"2020","featured":false,"url":"https://spacecatalog.org/object/koi-1783-02","radius_km":34696.864,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"KOI-1783","host_v_mag":13.978,"eccentricity":0,"uncertainties":{"mass_kg":[2.1499804324048965e+25,2.568032183150293e+25],"radius_km":[1913.43,3316.612],"distance_ly":[43.44402951187023,44.79431691561754],"host_mass_solar":[0.032,0.036],"host_radius_solar":[0.03,0.031],"host_temperature_k":[60,60],"semi_major_axis_km":[1376300.4104399998,1376300.4104399998],"orbital_period_days":[0.021,0.026]},"host_mass_solar":1.076,"inclination_deg":89.65,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.143,"planets_in_system":2,"discovery_facility":"Kepler","host_temperature_k":5922,"orbital_period_days":284.215,"transit_midpoint_bjd":2455033.83937,"equilibrium_temperature_k":321},"designations":[{"catalog":"Exoplanet","designation":"KOI-1783.02"}],"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."}