{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T18:45:49.402Z","years_from_j2000":26.67,"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":"k2-83-b","name":"K2-83 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":409.42083938405085,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":59.9013782,"dec_deg":15.5587994,"epoch_ra_deg":60.281248,"epoch_dec_deg":15.635328,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-83","semi_major_axis_km":4508879.822898,"periapsis_km":null,"mass_kg":1.2422109165006069e+25,"mass_msun":0.00000624726,"constellation":"Taurus","discovered":"2016","featured":false,"url":"https://spacecatalog.org/object/k2-83-b","radius_km":7934.356400000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-83","host_v_mag":14.522,"eccentricity":0.07,"uncertainties":{"radius_km":[625.0538,625.0538],"distance_ly":[1.6699206539097264,1.682966909018396],"eccentricity":[0.053944,0.139767],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.88,0.86],"host_radius_solar":[0.016,0.016],"host_temperature_k":[49,49],"semi_major_axis_km":[61335.126986999996,61335.126986999996],"orbital_period_days":[0.00018,0.00018],"argument_of_periastron_deg":[131.8463,132.2536]},"host_mass_solar":0.484,"inclination_deg":88.72,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.424,"planets_in_system":2,"discovery_facility":"K2","host_temperature_k":3910,"orbital_period_days":2.74697,"transit_midpoint_bjd":2457067.0633,"equilibrium_temperature_k":707.17,"argument_of_periastron_deg":-5.43},"designations":[{"catalog":"Exoplanet","designation":"K2-83 b"},{"catalog":"Host star","designation":"K2-83"}],"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":"2026-09-02T18:38:07.546Z","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."}