{"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":"2026-09-07T05:54:11.411Z","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-5300-b","name":"TOI-5300 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":530.0367294274797,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":356.481137,"dec_deg":0.4587978,"epoch_ra_deg":356.825278,"epoch_dec_deg":0.607983,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-5300","semi_major_axis_km":4413137.185649999,"periapsis_km":null,"mass_kg":1.1388747598540323e+27,"mass_msun":0.000572757,"constellation":"Pisces","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/toi-5300-b","radius_km":62912.959851862004,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-5300","host_v_mag":13.869,"eccentricity":0,"uncertainties":{"mass_kg":[1.8981245997567207e+26,1.8981245997567207e+26],"radius_km":[5719.3600097260005,5719.3600097260005],"distance_ly":[2.6646976059457934,2.6875285523859658],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.6,0.5],"host_radius_solar":[0.06,0.06],"host_temperature_k":[207,207],"semi_major_axis_km":[44879.361209999995,44879.361209999995],"orbital_period_days":[0.000003,0.000003]},"host_mass_solar":0.67,"inclination_deg":89.2,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.65,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"K4 V","host_temperature_k":4610,"orbital_period_days":2.262196,"transit_midpoint_bjd":2459470.4174,"equilibrium_temperature_k":1043},"designations":[{"catalog":"Exoplanet","designation":"TOI-5300 b"},{"catalog":"Host star","designation":"TOI-5300"}],"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."}