{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T08:08:36.374Z","years_from_j2000":26.683,"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-500-b","name":"TOI-500 b","class":"terrestrial_planet","category":"exoplanet","object_type":"Terrestrial planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":154.57333515302992,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":106.559098,"dec_deg":-47.5878156,"epoch_ra_deg":106.745642,"epoch_dec_deg":-47.628476,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-500","semi_major_axis_km":1778718.682623,"periapsis_km":null,"mass_kg":8.480478372263758e+24,"mass_msun":0.00000426495,"constellation":"Puppis","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/toi-500-b","radius_km":7436.8646,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-500","host_v_mag":10.54,"eccentricity":0.063,"uncertainties":{"mass_kg":[1.0749902162024483e+24,1.0749902162024483e+24],"radius_km":[369.92980000000006,389.0641],"distance_ly":[0.15427196666001963,0.15427196666001963],"eccentricity":[0.044,0.073],"host_mass_solar":[0.017,0.017],"inclination_deg":[1.31,2.53],"host_radius_solar":[0.016,0.016],"host_temperature_k":[100,100],"semi_major_axis_km":[59839.14828,61335.126986999996],"orbital_period_days":[0.000019,0.000019],"argument_of_periastron_deg":[160.6,72.9]},"host_mass_solar":0.74,"inclination_deg":82.09,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.678,"planets_in_system":4,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K6 V","host_temperature_k":4440,"orbital_period_days":0.548177,"transit_midpoint_bjd":2458468.3905,"equilibrium_temperature_k":1617,"argument_of_periastron_deg":228.5},"designations":[{"catalog":"Exoplanet","designation":"TOI-500 b"},{"catalog":"Host star","designation":"TOI-500"}],"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."}