{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T15:19:40.352Z","years_from_j2000":26.683,"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-59-b","name":"HATS-59 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":2096.8071673205086,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":170.324325,"dec_deg":-22.388177,"epoch_ra_deg":170.657431,"epoch_dec_deg":-22.535323,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-59","semi_major_axis_km":9143421.857183998,"periapsis_km":null,"mass_kg":1.529896095416628e+27,"mass_msun":0.000769407,"constellation":"Crater","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/hats-59-b","radius_km":80500.1303854,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-59","host_v_mag":14.033,"eccentricity":0.129,"uncertainties":{"mass_kg":[1.3097125382598925e+26,1.3097125382598925e+26],"radius_km":[5504.8934633,5504.8934633],"distance_ly":[43.61036926450576,45.46619905371403],"eccentricity":[0.049,0.049],"host_mass_solar":[0.039,0.039],"inclination_deg":[0.33,0.33],"host_radius_solar":[0.067,0.067],"host_temperature_k":[91,91],"semi_major_axis_km":[113694.381732,113694.381732],"orbital_period_days":[0.000016,0.000016],"argument_of_periastron_deg":[29,29]},"host_mass_solar":1.038,"inclination_deg":88.1,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":1.036,"planets_in_system":2,"discovery_facility":"HATSouth","host_temperature_k":5670,"orbital_period_days":5.416081,"transit_midpoint_bjd":2456620.66527,"equilibrium_temperature_k":1128,"argument_of_periastron_deg":227},"designations":[{"catalog":"Exoplanet","designation":"HATS-59 b"},{"catalog":"Host star","designation":"HATS-59"}],"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."}