{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T22:22:23.033Z","years_from_j2000":26.682,"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-4641-b","name":"TOI-4641 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":281.63635831478564,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":42.5582023,"dec_deg":25.3335334,"epoch_ra_deg":42.949819,"epoch_dec_deg":25.444916,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-4641","semi_major_axis_km":25880431.631099995,"periapsis_km":null,"mass_kg":7.34574220105851e+27,"mass_msun":0.00369428,"constellation":"Aries","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-4641-b","radius_km":52189.159849571,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-4641","host_v_mag":7.51,"uncertainties":{"radius_km":[2001.7759970260004,1858.7920063500003],"distance_ly":[1.5534828270648489,1.5704429587061195],"host_mass_solar":[0.059,0.068],"inclination_deg":[0.084,0.088],"host_radius_solar":[0.043,0.041],"host_temperature_k":[340,300],"semi_major_axis_km":[2243968.0604999997,2243968.0604999997],"orbital_period_days":[0.000047,0.000051]},"host_mass_solar":1.41,"inclination_deg":87.9,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.72,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6560,"orbital_period_days":22.09341,"transit_midpoint_bjd":2459510.82759,"eccentricity_upper_limit":0.074,"equilibrium_temperature_k":950.11},"designations":[{"catalog":"Exoplanet","designation":"TOI-4641 b"},{"catalog":"Host star","designation":"TOI-4641"}],"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."}