{"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":"2026-09-08T04:02:05.939Z","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-1248-b","name":"TOI-1248 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":550.339963940347,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":259.0235918,"dec_deg":63.1056072,"epoch_ra_deg":259.079366,"epoch_dec_deg":63.074928,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1248","semi_major_axis_km":7629491.405699999,"periapsis_km":null,"mass_kg":1.6363739957748377e+26,"mass_msun":0.0000822956,"constellation":"Draco","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-1248-b","radius_km":43425.20391879,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1248","host_v_mag":11.806,"eccentricity":0,"uncertainties":{"mass_kg":[2.090258753726983e+25,2.1499804324048965e+25],"radius_km":[767.139626634,744.4263196],"distance_ly":[1.9471535749689581,1.9634613938547953],"host_mass_solar":[0.0275,0.0273],"host_radius_solar":[0.0134,0.0133],"host_temperature_k":[62,56],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.0000011,0.0000011]},"host_mass_solar":0.9042,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.8686,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5205,"orbital_period_days":4.3601561,"transit_midpoint_bjd":2458687.12116,"equilibrium_temperature_k":952.09,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1248 b"},{"catalog":"Host star","designation":"TOI-1248"}],"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."}