{"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":"2026-09-06T11:04:06.204Z","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-25-b","name":"NGTS-25 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1700.034672264313,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":307.4182976,"dec_deg":-39.0323568,"epoch_ra_deg":307.859496,"epoch_dec_deg":-38.94284,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"NGTS-25","semi_major_axis_km":5804397.38316,"periapsis_km":null,"mass_kg":1.2129016192266281e+27,"mass_msun":0.000609986,"constellation":"Microscopium","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/ngts-25-b","radius_km":73136.315823006,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"NGTS-25","host_v_mag":14.333,"eccentricity":0,"uncertainties":{"mass_kg":[9.870247916346081e+25,1.1009122680977846e+26],"radius_km":[3717.5840127000006,2502.2199643920003],"distance_ly":[26.457808621946,27.289504123559926],"host_mass_solar":[0.04,0.03],"inclination_deg":[0.58,0.42],"host_radius_solar":[0.05,0.02],"host_temperature_k":[58,58],"semi_major_axis_km":[299195.7414,209437.01898],"orbital_period_days":[0.0000033,0.0000033]},"host_mass_solar":0.91,"inclination_deg":89.34,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.86,"planets_in_system":1,"discovery_facility":"Next-Generation Transit Survey (NGTS)","host_spectral_type":"K0 V","host_temperature_k":5321,"orbital_period_days":2.823093,"transit_midpoint_bjd":2458204.26373,"equilibrium_temperature_k":1101},"designations":[{"catalog":"Exoplanet","designation":"NGTS-25 b"},{"catalog":"Host star","designation":"NGTS-25"}],"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."}