{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T14:35:08.774Z","years_from_j2000":26.681,"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":"hat-p-46-b","name":"HAT-P-46 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":948.2540063185511,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":270.4441831,"dec_deg":-2.97098,"epoch_ra_deg":270.796159,"epoch_dec_deg":-2.971654,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HAT-P-46","semi_major_axis_km":8631797.13939,"periapsis_km":null,"mass_kg":9.357431501970244e+26,"mass_msun":0.000470599,"constellation":"Serpens","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/hat-p-46-b","radius_km":91793.6152,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HAT-P-46","host_v_mag":11.997,"eccentricity":0.123,"uncertainties":{"mass_kg":[9.869604618312032e+25,1.5564066680251114e+26],"radius_km":[9509.7471,19376.6678],"distance_ly":[16.112125059207127,16.66659090132559],"eccentricity":[0.12,0.12],"host_mass_solar":[0.06,0.095],"inclination_deg":[2.3,0.8],"host_radius_solar":[0.136,0.293],"host_temperature_k":[100,100],"semi_major_axis_km":[134638.08362999998,209437.01898],"orbital_period_days":[0.000048,0.000048],"argument_of_periastron_deg":[87,87]},"host_mass_solar":1.284,"inclination_deg":85.5,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.396,"planets_in_system":1,"discovery_facility":"HATNet","host_temperature_k":6120,"orbital_period_days":4.463129,"transit_midpoint_bjd":2455701.33646,"equilibrium_temperature_k":1458,"argument_of_periastron_deg":70},"designations":[{"catalog":"Exoplanet","designation":"HAT-P-46 b"},{"catalog":"Host star","designation":"HAT-P-46"}],"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."}