{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T06:04:52.589Z","years_from_j2000":26.68,"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":"ngts-24-b","name":"NGTS-24 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2227.850276759542,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":168.5638892,"dec_deg":-37.9101328,"epoch_ra_deg":168.883494,"epoch_dec_deg":-38.05635,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"NGTS-24","semi_major_axis_km":7165738.006529999,"periapsis_km":null,"mass_kg":9.870247918734947e+26,"mass_msun":0.000496389,"constellation":"Centaurus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/ngts-24-b","radius_km":86791.28776171702,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"NGTS-24","host_v_mag":13.214,"eccentricity":0,"uncertainties":{"mass_kg":[2.0879370597323927e+26,2.2777495197080647e+26],"radius_km":[4432.50396608,4146.535984728001],"distance_ly":[34.92808648968605,36.033756610145815],"host_mass_solar":[0.21,0.05],"inclination_deg":[0.61,0.52],"host_radius_solar":[0.09,0.03],"host_temperature_k":[8,93],"semi_major_axis_km":[448793.61209999997,418874.03796],"orbital_period_days":[0.000007,0.000007]},"host_mass_solar":1.26,"inclination_deg":82.61,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.64,"planets_in_system":1,"discovery_facility":"Next-Generation Transit Survey (NGTS)","host_spectral_type":"G2 IV","host_temperature_k":5820,"orbital_period_days":3.4678796,"transit_midpoint_bjd":2458100.6229,"equilibrium_temperature_k":1499},"designations":[{"catalog":"Exoplanet","designation":"NGTS-24 b"},{"catalog":"Host star","designation":"NGTS-24"}],"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."}