{"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":"2026-09-09T00:57:13.508Z","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-1736-c","name":"TOI-1736 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":290.11022716424435,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":43.4344615,"dec_deg":69.101345,"epoch_ra_deg":44.046036,"epoch_dec_deg":69.211036,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1736","semi_major_axis_km":204949082.859,"periapsis_km":null,"mass_kg":1.6722070029815861e+28,"mass_msun":0.00840977,"constellation":"Cassiopeia","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/toi-1736-c","radius_km":79726.25,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1736","host_v_mag":8.953,"eccentricity":0.3685,"uncertainties":{"mass_kg":[1.1944335735582758e+27,2.9860839338956895e+27],"distance_ly":[1.0430480959381454,1.0498973798701972],"eccentricity":[0.0021,0.0021],"host_mass_solar":[0.0331,0.0368],"inclination_deg":[17,15],"host_radius_solar":[0.0249,0.0267],"host_temperature_k":[80,86],"semi_major_axis_km":[4487936.120999999,4487936.120999999],"orbital_period_days":[0.46,0.46],"argument_of_periastron_deg":[0.44,0.44]},"host_mass_solar":1.0373,"inclination_deg":69,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.4286,"planets_in_system":2,"discovery_facility":"Haute-Provence Observatory","host_temperature_k":5636,"orbital_period_days":571.25,"transit_midpoint_bjd":2458701.81,"equilibrium_temperature_k":249,"argument_of_periastron_deg":162.22},"designations":[{"catalog":"Exoplanet","designation":"TOI-1736 c"},{"catalog":"Host star","designation":"TOI-1736"}],"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."}