{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T03:11:33.685Z","years_from_j2000":26.685,"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-5-b","name":"HATS-5 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":803.5971296736211,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":67.2228465,"dec_deg":-21.4820568,"epoch_ra_deg":67.513222,"epoch_dec_deg":-21.422362,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-5","semi_major_axis_km":8108204.591939999,"periapsis_km":null,"mass_kg":4.4984160030565e+26,"mass_msun":0.000226232,"constellation":"Eridanus","discovered":"2014","featured":false,"url":"https://spacecatalog.org/object/hats-5-b","radius_km":65203.316300000006,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-5","host_v_mag":12.598,"eccentricity":0.019,"uncertainties":{"mass_kg":[2.337506503453546e+25,2.2777848247756322e+25],"radius_km":[1785.8680000000002,1785.8680000000002],"distance_ly":[5.60662813295082,5.68164409982567],"eccentricity":[0.019,0.019],"host_mass_solar":[0.028,0.028],"inclination_deg":[0.3,0.3],"host_radius_solar":[0.023,0.023],"host_temperature_k":[50,50],"semi_major_axis_km":[89758.72241999999,89758.72241999999],"orbital_period_days":[0.00001,0.00001],"argument_of_periastron_deg":[107,107]},"host_mass_solar":0.936,"inclination_deg":89.3,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.871,"planets_in_system":1,"discovery_facility":"HATSouth","host_spectral_type":"G","host_temperature_k":5304,"orbital_period_days":4.763387,"transit_midpoint_bjd":2456273.79068,"equilibrium_temperature_k":1025,"argument_of_periastron_deg":204},"designations":[{"catalog":"Exoplanet","designation":"HATS-5 b"},{"catalog":"Host star","designation":"HATS-5"}],"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."}