{"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":"2026-09-05T13:13:54.400Z","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-2049-b","name":"TOI-2049 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1863.9412983220852,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":346.9098199,"dec_deg":56.694513,"epoch_ra_deg":347.199443,"epoch_dec_deg":56.839736,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2049","semi_major_axis_km":10350676.673733,"periapsis_km":null,"mass_kg":2.9041306376277825e+27,"mass_msun":0.00146053,"constellation":"Cassiopeia","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-2049-b","radius_km":106165.619710154,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2049","host_v_mag":11.413,"eccentricity":0.054,"uncertainties":{"mass_kg":[3.4166242795620975e+26,3.4166242795620975e+26],"radius_km":[4789.964006551,5075.931987903],"distance_ly":[29.011613059468107,29.928109219288377],"eccentricity":[0.038,0.068],"host_mass_solar":[0.03,0.03],"inclination_deg":[0.7,0.41],"host_radius_solar":[0.01,0.01],"host_temperature_k":[202,202],"semi_major_axis_km":[77790.89276399999,77790.89276399999],"orbital_period_days":[0.000048,0.00005],"argument_of_periastron_deg":[126,64]},"host_mass_solar":1.57,"inclination_deg":78.85,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":3.2,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":6164,"orbital_period_days":5.303468,"transit_midpoint_bjd":2458768.846,"equilibrium_temperature_k":1869,"argument_of_periastron_deg":39},"designations":[{"catalog":"Exoplanet","designation":"TOI-2049 b"},{"catalog":"Host star","designation":"TOI-2049"}],"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."}