{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T08:42:23.907Z","years_from_j2000":26.683,"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":"k2-419-a-b","name":"K2-419 A b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":876.3332634682321,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":135.0194934,"dec_deg":13.2737056,"epoch_ra_deg":135.388886,"epoch_dec_deg":13.169183,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"K2-419 A","semi_major_axis_km":18071422.780559998,"periapsis_km":null,"mass_kg":1.1705449020871103e+27,"mass_msun":0.000588684,"constellation":"Cancer","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/k2-419-a-b","radius_km":67288.955,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"K2-419 A","host_v_mag":16.52,"eccentricity":0.042,"uncertainties":{"mass_kg":[8.95825180168707e+25,8.95825180168707e+25],"radius_km":[2487.4590000000003,2487.4590000000003],"distance_ly":[11.94221577009856,11.94221577009856],"eccentricity":[0.029,0.045],"host_mass_solar":[0.024,0.024],"inclination_deg":[0.09,0.12],"host_radius_solar":[0.017,0.017],"host_temperature_k":[88,88],"semi_major_axis_km":[254316.38018999997,239356.59312],"orbital_period_days":[0.00000575,0.00000614],"argument_of_periastron_deg":[69.56,58.56]},"host_mass_solar":0.562,"inclination_deg":89.54,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.541,"planets_in_system":1,"discovery_facility":"K2","host_temperature_k":3711,"orbital_period_days":20.35847252,"transit_midpoint_bjd":2459553.7138,"equilibrium_temperature_k":377,"argument_of_periastron_deg":0.97},"designations":[{"catalog":"Exoplanet","designation":"K2-419 A b"},{"catalog":"Host star","designation":"K2-419 A"}],"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."}