{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T22:45:46.603Z","years_from_j2000":26.687,"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-1669-c","name":"TOI-1669 c","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":362.9337708680834,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":45.9564744,"dec_deg":83.5874273,"epoch_ra_deg":47.261798,"epoch_dec_deg":83.691889,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1669","semi_major_axis_km":5624879.93832,"periapsis_km":null,"mass_kg":7.763818228128793e+25,"mass_msun":0.0000390454,"constellation":"Cepheus","discovered":"2024","featured":false,"url":"https://spacecatalog.org/object/toi-1669-c","radius_km":14646.65417037,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1669","host_v_mag":10.218,"eccentricity":0,"uncertainties":{"radius_km":[575.4879265940001,648.6137360280001],"distance_ly":[1.2002554699976158,1.210040161329118],"host_mass_solar":[0.0309,0.0322],"host_radius_solar":[0.0183,0.0188],"host_temperature_k":[72,73],"semi_major_axis_km":[104718.50949,104718.50949],"orbital_period_days":[0.0000062,0.0000062]},"host_mass_solar":0.9867,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.0561,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5497,"orbital_period_days":2.6800535,"transit_midpoint_bjd":2458816.94479,"equilibrium_temperature_k":1285.16,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1669 c"},{"catalog":"Host star","designation":"TOI-1669"}],"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."}