{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T23:35:04.608Z","years_from_j2000":26.684,"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-1298-b","name":"TOI-1298 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1040.5562612123895,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":241.3229012,"dec_deg":70.1900397,"epoch_ra_deg":241.306674,"epoch_dec_deg":70.116214,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1298","semi_major_axis_km":8527078.6299,"periapsis_km":null,"mass_kg":5.9124461891134656e+26,"mass_msun":0.000297345,"constellation":"Ursa Minor","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1298-b","radius_km":61600.138371773,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1298","host_v_mag":11.889,"eccentricity":0,"uncertainties":{"mass_kg":[3.5833007206748275e+25,3.5833007206748275e+25],"radius_km":[1104.670018035,1269.028616336],"distance_ly":[6.451373151237185,6.526389118112036],"host_mass_solar":[0.0568,0.0246],"inclination_deg":[0.86,0.73],"host_radius_solar":[0.0239,0.0275],"host_temperature_k":[99,69],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.000003,0.000003],"argument_of_periastron_deg":[110,110]},"host_mass_solar":1.2187,"inclination_deg":88.96,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.4536,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5752,"orbital_period_days":4.537143,"transit_midpoint_bjd":2458934.12245,"equilibrium_temperature_k":1278,"argument_of_periastron_deg":57},"designations":[{"catalog":"Exoplanet","designation":"TOI-1298 b"},{"catalog":"Host star","designation":"TOI-1298"}],"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."}