{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-09T00:54:45.169Z","years_from_j2000":26.687,"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":"toi-791-c","name":"TOI-791 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1112.9140536088491,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":118.4347574,"dec_deg":-69.7017359,"epoch_ra_deg":118.419715,"epoch_dec_deg":-69.770913,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-791","semi_major_axis_km":129102962.41409999,"periapsis_km":null,"mass_kg":1.1108232234091967e+26,"mass_msun":0.0000558649,"constellation":"Volans","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-791-c","radius_km":82573.25978165101,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-791","host_v_mag":11.093,"eccentricity":0.028,"uncertainties":{"mass_kg":[1.2481830843683981e+25,1.3377656023852692e+25],"radius_km":[2859.6800048630002,2859.6800048630002],"distance_ly":[9.934723265252003,10.114109272996213],"eccentricity":[0.028,0.013],"host_mass_solar":[0.08,0.08],"inclination_deg":[0.013,0.013],"host_radius_solar":[0.047,0.047],"host_temperature_k":[128,128],"semi_major_axis_km":[4787131.8624,4787131.8624],"orbital_period_days":[0.00071,0.00067]},"host_mass_solar":1.28,"inclination_deg":89.695,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.474,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F7","host_temperature_k":6294,"orbital_period_days":232.0157,"transit_midpoint_bjd":2459433.98252,"equilibrium_temperature_k":362.8},"designations":[{"catalog":"Exoplanet","designation":"TOI-791 c"},{"catalog":"Host star","designation":"TOI-791"}],"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."}