{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T15:25:58.037Z","years_from_j2000":26.678,"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-669-b","name":"TOI-669 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":465.9698321525798,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":158.9007013,"dec_deg":-5.1813735,"epoch_ra_deg":159.239756,"epoch_dec_deg":-5.320227,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-669","semi_major_axis_km":7180697.7935999995,"periapsis_km":null,"mass_kg":5.972167867791379e+25,"mass_msun":0.0000300349,"constellation":"Sextans","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-669-b","radius_km":16494.180347347,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-669","host_v_mag":10.606,"eccentricity":0,"uncertainties":{"mass_kg":[8.361035014907931e+24,8.361035014907931e+24],"radius_km":[702.5137197270001,831.8789361590001],"distance_ly":[2.7592829554836493,2.788637029478156],"host_mass_solar":[0.0303,0.0327],"inclination_deg":[4.42672,2.83855],"host_radius_solar":[0.0175,0.0176],"host_temperature_k":[72,72],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.000018,0.000018]},"host_mass_solar":0.9245,"inclination_deg":85.78281,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.9882,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5597,"orbital_period_days":3.945152,"transit_midpoint_bjd":2458546.1419,"equilibrium_temperature_k":1124.85,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-669 b"},{"catalog":"Host star","designation":"TOI-669"}],"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."}