{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T05:24:21.076Z","years_from_j2000":26.685,"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-5688-a-b","name":"TOI-5688 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":738.1505909209794,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":266.9231001,"dec_deg":47.7050486,"epoch_ra_deg":267.103341,"epoch_dec_deg":47.694947,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-5688 A","semi_major_axis_km":5054912.050953,"periapsis_km":null,"mass_kg":7.40548815606131e+26,"mass_msun":0.000372433,"constellation":"Hercules","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-5688-a-b","radius_km":65694.43000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-5688 A","host_v_mag":15.78,"eccentricity":0.128,"uncertainties":{"mass_kg":[1.4572089597410964e+26,1.3974872810631827e+26],"radius_km":[4464.67,3826.86],"distance_ly":[6.428542204797013,6.539435373220705],"eccentricity":[0.077,0.078],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.25,0.31],"host_radius_solar":[0.02,0.02],"host_temperature_k":[59,59],"semi_major_axis_km":[67319.04181499999,68815.02052199999],"orbital_period_days":[0.00000448,0.00000452],"argument_of_periastron_deg":[0.86,1.12]},"host_mass_solar":0.6,"inclination_deg":87.05,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.57,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":3713,"orbital_period_days":2.94815527,"transit_midpoint_bjd":2459771.26024,"equilibrium_temperature_k":742,"argument_of_periastron_deg":-1.32},"designations":[{"catalog":"Exoplanet","designation":"TOI-5688 A b"},{"catalog":"Host star","designation":"TOI-5688 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."}