{"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":"2026-09-07T19:27:06.490Z","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-1789-b","name":"TOI-1789 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":747.1166297444126,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":142.743406,"dec_deg":26.5399951,"epoch_ra_deg":143.133501,"epoch_dec_deg":26.422017,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1789","semi_major_axis_km":7303368.0475739995,"periapsis_km":null,"mass_kg":1.3286872198297045e+27,"mass_msun":0.000668216,"constellation":"Leo","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1789-b","radius_km":102948.479728601,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1789","host_v_mag":9.721,"uncertainties":{"mass_kg":[3.036999359610753e+26,3.036999359610753e+26],"radius_km":[10008.879985130001,17158.079965397],"distance_ly":[7.632059238571795,7.7886142998758325],"host_mass_solar":[0.14,0.059],"inclination_deg":[0.58,0.36],"host_radius_solar":[0.034,0.036],"host_temperature_k":[55,55],"semi_major_axis_km":[239356.59312,94246.658541],"orbital_period_days":[0.000015,0.000015]},"host_mass_solar":1.507,"inclination_deg":78.41,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.168,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"F","host_temperature_k":5991,"orbital_period_days":3.208664,"transit_midpoint_bjd":2458873.65374,"equilibrium_temperature_k":1927},"designations":[{"catalog":"Exoplanet","designation":"TOI-1789 b"},{"catalog":"Host star","designation":"TOI-1789"}],"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."}