{"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":"2026-09-05T12:11:50.164Z","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-1601-b","name":"TOI-1601 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1097.8684599047756,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":38.361569,"dec_deg":41.0134321,"epoch_ra_deg":38.78542,"epoch_dec_deg":41.131767,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1601","semi_major_axis_km":10322253.0783,"periapsis_km":null,"mass_kg":2.3112289648352636e+27,"mass_msun":0.00116235,"constellation":"Andromeda","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1601-b","radius_km":90562.791338883,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1601","host_v_mag":10.66,"eccentricity":0,"uncertainties":{"mass_kg":[1.0152685375245344e+26,9.555468588466207e+25],"radius_km":[3260.60335266,4136.651396691001],"distance_ly":[26.08598708978514,27.361258526657604],"host_mass_solar":[0.0505,0.0347],"inclination_deg":[1.1,0.81],"host_radius_solar":[0.0623,0.0622],"host_temperature_k":[64,78],"semi_major_axis_km":[149597.8707,149597.8707],"orbital_period_days":[0.00014,0.00014]},"host_mass_solar":1.5055,"inclination_deg":88.84,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.195,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5982,"orbital_period_days":5.33175,"transit_midpoint_bjd":2458793.2753,"equilibrium_temperature_k":1493.97,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1601 b"},{"catalog":"Host star","designation":"TOI-1601"}],"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."}