{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T02:16:40.566Z","years_from_j2000":26.677,"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-33-b","name":"HAT-P-33 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1291.9380277737923,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":113.1842383,"dec_deg":33.8350214,"epoch_ra_deg":113.620863,"epoch_dec_deg":33.777732,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HAT-P-33","semi_major_axis_km":7472413.641465,"periapsis_km":null,"mass_kg":1.7462833843465233e+27,"mass_msun":0.000878231,"constellation":"Gemini","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/hat-p-33-b","radius_km":132260.427365,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HAT-P-33","host_v_mag":11.032,"eccentricity":0,"uncertainties":{"mass_kg":[9.49067056710067e+26,9.49067056710067e+26],"radius_km":[35031.140221,35031.140221],"distance_ly":[24.031201910169656,24.94117820399937],"host_mass_solar":[1.45,1.45],"inclination_deg":[0.05,0.05],"host_radius_solar":[0.48,0.48],"host_temperature_k":[88,88],"semi_major_axis_km":[73302.956643,71806.977936],"orbital_period_days":[0.000001,0.000001],"argument_of_periastron_deg":[22,22]},"host_mass_solar":1.82,"inclination_deg":87.2,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.79,"planets_in_system":1,"discovery_facility":"HATNet","host_spectral_type":"F4","host_temperature_k":6446,"orbital_period_days":3.47447,"transit_midpoint_bjd":2458078.129918,"equilibrium_temperature_k":1782,"argument_of_periastron_deg":15},"designations":[{"catalog":"Exoplanet","designation":"HAT-P-33 b"},{"catalog":"Host star","designation":"HAT-P-33"}],"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."}