{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T18:25:04.429Z","years_from_j2000":26.684,"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-1201-b","name":"TOI-1201 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":123.57119298192029,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":42.2476999,"dec_deg":-14.5372835,"epoch_ra_deg":42.566352,"epoch_dec_deg":-14.42528,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1201","semi_major_axis_km":4293458.88909,"periapsis_km":null,"mass_kg":3.750521420972986e+25,"mass_msun":0.0000188619,"constellation":"Eridanus","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1201-b","radius_km":15403.1115,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1201","host_v_mag":12.26,"eccentricity":0,"uncertainties":{"mass_kg":[5.255507723656414e+24,5.016621008944759e+24],"radius_km":[574.029,580.4071],"distance_ly":[0.1682966909018396,0.1682966909018396],"host_mass_solar":[0.02,0.02],"inclination_deg":[0.4,0.42],"host_radius_solar":[0.016,0.016],"host_temperature_k":[51,51],"semi_major_axis_km":[179517.44483999998,179517.44483999998],"orbital_period_days":[0.0000031,0.000003]},"host_mass_solar":0.512,"inclination_deg":88.11,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.508,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M2.0 V","host_temperature_k":3476,"orbital_period_days":2.4919863,"transit_midpoint_bjd":2459169.23222,"equilibrium_temperature_k":703,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1201 b"},{"catalog":"Host star","designation":"TOI-1201"}],"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."}