{"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":"2026-09-05T04:57:05.859Z","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":"hats-56-b","name":"HATS-56 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":1840.8559499072944,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":180.165072,"dec_deg":-45.7994559,"epoch_ra_deg":180.507754,"epoch_dec_deg":-45.948994,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HATS-56","semi_major_axis_km":9040199.326400999,"periapsis_km":null,"mass_kg":1.1426767362789208e+27,"mass_msun":0.000574669,"constellation":"Centaurus","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/hats-56-b","radius_km":120678.7034552,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HATS-56","host_v_mag":11.477,"uncertainties":{"mass_kg":[6.64346939697047e+25,6.64346939697047e+25],"radius_km":[3932.0667595000004,2788.1927931],"distance_ly":[36.1055110132435,37.55038376652867],"host_mass_solar":[0.017,0.017],"inclination_deg":[0.21,0.21],"host_radius_solar":[0.036,0.036],"host_temperature_k":[31,31],"semi_major_axis_km":[32911.531554,32911.531554],"orbital_period_days":[0.000027,0.000027]},"host_mass_solar":1.573,"inclination_deg":83.29,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":2.201,"planets_in_system":1,"discovery_facility":"HATSouth","host_temperature_k":6536,"orbital_period_days":4.324799,"transit_midpoint_bjd":2457788.0029,"eccentricity_upper_limit":0.019,"equilibrium_temperature_k":1902},"designations":[{"catalog":"Exoplanet","designation":"HATS-56 b"},{"catalog":"Host star","designation":"HATS-56"}],"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."}