{"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":"2026-09-01T01:58:29.024Z","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":"wispit-1-c","name":"WISPIT 1 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":750.18249969495,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":117.798555,"dec_deg":-50.1376852,"epoch_ra_deg":117.982841,"epoch_dec_deg":-50.20555,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WISPIT 1","semi_major_axis_km":125662211387.99998,"periapsis_km":null,"mass_kg":1.006006037871062e+28,"mass_msun":0.00505935,"constellation":"Puppis","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/wispit-1-c","radius_km":81639.68000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WISPIT 1","host_v_mag":13.182,"uncertainties":{"mass_kg":[1.1388747598540323e+27,1.5184996798053766e+27],"distance_ly":[3.962799989258433,4.005200318361609],"host_mass_solar":[0.084788,0.081548],"host_radius_solar":[0.082775,0.091336],"host_temperature_k":[540,990]},"host_mass_solar":0.72,"stars_in_system":2,"discovery_method":"Imaging","host_radius_solar":1.1161,"planets_in_system":2,"discovery_facility":"Paranal Observatory","host_spectral_type":"K4 V","host_temperature_k":4670,"equilibrium_temperature_k":8.21},"designations":[{"catalog":"Exoplanet","designation":"WISPIT 1 c"}],"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."}