{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T15:16:31.334Z","years_from_j2000":26.686,"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-4153-b","name":"TOI-4153 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1382.3811913146453,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":335.3934698,"dec_deg":82.2160792,"epoch_ra_deg":335.261365,"epoch_dec_deg":82.351055,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-4153","semi_major_axis_km":9441121.619877,"periapsis_km":null,"mass_kg":2.1828432897202287e+27,"mass_msun":0.00109778,"constellation":"Cepheus","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-4153-b","radius_km":102805.49573792501,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-4153","host_v_mag":11.601,"eccentricity":0.039,"uncertainties":{"mass_kg":[3.4166242795620975e+26,3.4166242795620975e+26],"radius_km":[3002.663995539,3217.139981553],"distance_ly":[11.754675852911433,11.953631243318647],"eccentricity":[0.028,0.047],"host_mass_solar":[0.071,0.064],"inclination_deg":[0.6,0.76],"host_radius_solar":[0.046,0.048],"host_temperature_k":[180,150],"semi_major_axis_km":[143613.955872,125662.211388],"orbital_period_days":[0.0000015,0.0000015],"argument_of_periastron_deg":[100,110]},"host_mass_solar":1.572,"inclination_deg":88.75,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.605,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6860,"orbital_period_days":4.6174141,"transit_midpoint_bjd":2459557.05746,"equilibrium_temperature_k":1669,"argument_of_periastron_deg":-165},"designations":[{"catalog":"Exoplanet","designation":"TOI-4153 b"},{"catalog":"Host star","designation":"TOI-4153"}],"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."}