{"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":"2026-09-06T22:27:51.463Z","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-201-c","name":"TOI-201 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":371.2474969360832,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":87.4017825,"dec_deg":-54.910423,"epoch_ra_deg":87.533502,"epoch_dec_deg":-54.901521,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-201","semi_major_axis_km":653742694.959,"periapsis_km":null,"mass_kg":2.980111766027898e+28,"mass_msun":0.0149874,"constellation":"Pictor","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-201-c","radius_km":66332.24,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-201","host_v_mag":9.07,"eccentricity":0.651,"uncertainties":{"mass_kg":[5.972167867791379e+26,5.972167867791379e+26],"radius_km":[1913.43,1913.43],"distance_ly":[1.1252395031227647,1.1317626306770996],"eccentricity":[0.006,0.006],"host_mass_solar":[0.04,0.02],"inclination_deg":[0.04,0.1],"host_radius_solar":[0.01,0.01],"host_temperature_k":[90,86],"semi_major_axis_km":[5983914.828,5983914.828],"orbital_period_days":[20,20],"argument_of_periastron_deg":[2,2]},"host_mass_solar":1.32,"inclination_deg":89.92,"stars_in_system":1,"discovery_method":"Transit Timing Variations","host_radius_solar":1.31,"planets_in_system":3,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F","host_temperature_k":6423,"orbital_period_days":2890,"transit_midpoint_bjd":2460062.59,"equilibrium_temperature_k":169.58,"argument_of_periastron_deg":96},"designations":[{"catalog":"Exoplanet","designation":"TOI-201 c"},{"catalog":"Host star","designation":"TOI-201"}],"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."}