{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T10:51:04.050Z","years_from_j2000":26.68,"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-2147-b","name":"TOI-2147 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":920.1132340491505,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":155.6415937,"dec_deg":83.0837241,"epoch_ra_deg":156.498098,"epoch_dec_deg":82.947951,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-2147","semi_major_axis_km":25730833.760399997,"periapsis_km":null,"mass_kg":6.927714726638e+26,"mass_msun":0.000348405,"constellation":"Camelopardalis","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-2147-b","radius_km":66970.05,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-2147","host_v_mag":11.098,"eccentricity":0.29,"uncertainties":{"mass_kg":[1.3138769309141035e+26,1.3138769309141035e+26],"radius_km":[1913.43,1913.43],"distance_ly":[8.134340060255582,8.277848866450947],"eccentricity":[0.07,0.07],"host_mass_solar":[0.04,0.04],"inclination_deg":[0.4,0.4],"host_radius_solar":[0.02,0.03],"host_temperature_k":[50,50],"semi_major_axis_km":[897587.2241999999,897587.2241999999],"orbital_period_days":[0.00003,0.00003],"argument_of_periastron_deg":[30,30]},"host_mass_solar":0.99,"inclination_deg":89.3,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.39,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5983,"orbital_period_days":26.20518,"transit_midpoint_bjd":2459389.5349,"equilibrium_temperature_k":820,"argument_of_periastron_deg":121},"designations":[{"catalog":"Exoplanet","designation":"TOI-2147 b"},{"catalog":"Host star","designation":"TOI-2147"}],"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."}