{"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":"2026-09-06T22:09:40.785Z","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-4504-d","name":"TOI-4504 d","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1117.4280578764487,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":114.4673065,"dec_deg":-62.0782776,"epoch_ra_deg":114.552616,"epoch_dec_deg":-62.138237,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-4504","semi_major_axis_km":33195767.508329995,"periapsis_km":null,"mass_kg":3.840103938989857e+27,"mass_msun":0.00193124,"constellation":"Carina","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-4504-d","radius_km":71817.406,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-4504","host_v_mag":13.364,"eccentricity":0.293,"uncertainties":{"mass_kg":[2.4485888257944654e+26,2.4485888257944654e+26],"radius_km":[3444.1740000000004,3444.1740000000004],"distance_ly":[5.541396857407471,5.5935818778421496],"eccentricity":[0.0014,0.0014],"host_mass_solar":[0.056,0.056],"inclination_deg":[0.038,0.038],"host_radius_solar":[0.026,0.026],"host_temperature_k":[60,60],"semi_major_axis_km":[703109.99229,703109.99229],"argument_of_periastron_deg":[0.15,0.15]},"host_mass_solar":0.875,"inclination_deg":88.982,"stars_in_system":1,"discovery_method":"Transit Timing Variations","host_radius_solar":0.93,"planets_in_system":3,"discovery_facility":"Multiple Observatories","host_spectral_type":"K1 V","host_temperature_k":5315,"orbital_period_days":41.2871975,"transit_midpoint_bjd":2458423.052035,"equilibrium_temperature_k":524.8,"argument_of_periastron_deg":195.97},"designations":[{"catalog":"Exoplanet","designation":"TOI-4504 d"}],"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."}