{"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":"2026-09-09T00:52:44.903Z","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-1634-b","name":"TOI-1634 b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":115.0470960502932,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":56.3906096,"dec_deg":37.1122803,"epoch_ra_deg":56.828608,"epoch_dec_deg":37.196551,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1634","semi_major_axis_km":2309791.123608,"periapsis_km":null,"mass_kg":2.926362255217776e+25,"mass_msun":0.0000147171,"constellation":"Perseus","discovered":"2021","featured":false,"url":"https://spacecatalog.org/object/toi-1634-b","radius_km":11219.0779,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1634","host_v_mag":13.217,"eccentricity":0,"uncertainties":{"mass_kg":[5.972167867791379e+24,5.972167867791379e+24],"radius_km":[363.55170000000004,369.92980000000006],"distance_ly":[0.17155825467900704,0.17188441105672378],"host_mass_solar":[0.014,0.014],"inclination_deg":[0.47,0.29],"host_radius_solar":[0.013,0.013],"host_temperature_k":[69,69],"semi_major_axis_km":[22439.680604999998,20943.701897999996],"orbital_period_days":[3.7e-7,3.6e-7]},"host_mass_solar":0.502,"inclination_deg":86.66,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":0.45,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"M2","host_temperature_k":3550,"orbital_period_days":0.98934551,"transit_midpoint_bjd":2459584.97039,"equilibrium_temperature_k":900,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1634 b"}],"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."}