{"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":"2026-09-08T21:56:49.139Z","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":"hats-22-b","name":"HATS-22 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":748.5875950079152,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":174.0098693,"dec_deg":-29.5433642,"epoch_ra_deg":174.344237,"epoch_dec_deg":-29.691959,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-22","semi_major_axis_km":7517293.002675,"periapsis_km":null,"mass_kg":5.200887470771167e+27,"mass_msun":0.0026156,"constellation":"Hydra","discovered":"2017","featured":false,"url":"https://spacecatalog.org/object/hats-22-b","radius_km":68131.9931237,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-22","host_v_mag":13.397,"eccentricity":0.079,"uncertainties":{"mass_kg":[2.0879475247621476e+26,2.0879475247621476e+26],"radius_km":[2073.2715641,3431.6218992],"distance_ly":[5.185886405696221,5.257640808793904],"eccentricity":[0.026,0.026],"host_mass_solar":[0.019,0.019],"inclination_deg":[0.21,0.21],"host_radius_solar":[0.018,0.028],"host_temperature_k":[55,55],"semi_major_axis_km":[62831.105694,62831.105694],"orbital_period_days":[0.0000052,0.0000052],"argument_of_periastron_deg":[73,73]},"host_mass_solar":0.759,"inclination_deg":87.96,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.689,"planets_in_system":1,"discovery_facility":"HATSouth","host_spectral_type":"K V","host_temperature_k":4803,"orbital_period_days":4.7228124,"transit_midpoint_bjd":2457078.5803,"equilibrium_temperature_k":858,"argument_of_periastron_deg":56},"designations":[{"catalog":"Exoplanet","designation":"HATS-22 b"},{"catalog":"Host star","designation":"HATS-22"}],"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."}