{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T19:08:39.392Z","years_from_j2000":26.684,"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-11","name":"HATS-11","class":"g0_yellow_star","category":"star","object_type":"G0 yellow star","mag":14.06,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":3080.88292860369,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":289.4007603,"dec_deg":-22.3900092,"epoch_ra_deg":289.80333,"epoch_dec_deg":-22.341997,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sagittarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hats-11","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19176-2223","companions":[{"measured":2016,"magnitude":18.5,"components":"AB","discoverer_code":"HTS  11","separation_arcsec":1.4,"position_angle_deg":302},{"measured":2016,"magnitude":20.9,"components":"AC","discoverer_code":"HTS  11","separation_arcsec":5.8,"position_angle_deg":314},{"measured":2016,"magnitude":17.8,"components":"AD","discoverer_code":"HTS  11","separation_arcsec":7.1,"position_angle_deg":263},{"measured":2016,"magnitude":22.8,"components":"AE","discoverer_code":"HTS  11","separation_arcsec":7.2,"position_angle_deg":303},{"measured":2016,"magnitude":18.9,"components":"AF","discoverer_code":"HTS  11","separation_arcsec":7.7,"position_angle_deg":282},{"measured":2016,"magnitude":20.9,"components":"AG","discoverer_code":"HTS  11","separation_arcsec":8.2,"position_angle_deg":250},{"measured":2016,"magnitude":21.5,"components":"AH","discoverer_code":"HTS  11","separation_arcsec":8.4,"position_angle_deg":49},{"measured":2016,"magnitude":21.6,"components":"AI","discoverer_code":"HTS  11","separation_arcsec":8.8,"position_angle_deg":336},{"measured":2016,"magnitude":20.9,"components":"AJ","discoverer_code":"HTS  11","separation_arcsec":12,"position_angle_deg":270},{"measured":2016,"magnitude":20.5,"components":"AK","discoverer_code":"HTS  11","separation_arcsec":12.8,"position_angle_deg":313},{"measured":2016,"magnitude":19.1,"components":"AL","discoverer_code":"HTS  11","separation_arcsec":14.6,"position_angle_deg":230},{"measured":2016,"magnitude":22,"components":"AM","discoverer_code":"HTS  11","separation_arcsec":15.1,"position_angle_deg":125},{"measured":2016,"magnitude":22.4,"components":"AN","discoverer_code":"HTS  11","separation_arcsec":15.8,"position_angle_deg":276},{"measured":2016,"magnitude":18.5,"components":"AO","discoverer_code":"HTS  11","separation_arcsec":16.4,"position_angle_deg":146},{"measured":2016,"magnitude":20.7,"components":"AP","discoverer_code":"HTS  11","separation_arcsec":16.8,"position_angle_deg":38},{"measured":2016,"magnitude":22.1,"components":"AQ","discoverer_code":"HTS  11","separation_arcsec":16.8,"position_angle_deg":132},{"measured":2016,"magnitude":20.2,"components":"AR","discoverer_code":"HTS  11","separation_arcsec":16.8,"position_angle_deg":10},{"measured":2016,"magnitude":17.7,"components":"AS","discoverer_code":"HTS  11","separation_arcsec":16.8,"position_angle_deg":137},{"measured":2016,"magnitude":20,"components":"AT","discoverer_code":"HTS  11","separation_arcsec":17.2,"position_angle_deg":202},{"measured":2016,"magnitude":21.5,"components":"AU","discoverer_code":"HTS  11","separation_arcsec":18.1,"position_angle_deg":330},{"measured":2016,"magnitude":20.7,"components":"AV","discoverer_code":"HTS  11","separation_arcsec":20.5,"position_angle_deg":279},{"measured":2016,"magnitude":21.4,"components":"A,Wa","discoverer_code":"HTS  11","separation_arcsec":20.9,"position_angle_deg":34},{"measured":2016,"magnitude":21.4,"components":"A,Wb","discoverer_code":"HTS  11","separation_arcsec":21.9,"position_angle_deg":62},{"measured":2016,"magnitude":21.4,"components":"A,Wc","discoverer_code":"HTS  11","separation_arcsec":22,"position_angle_deg":247},{"measured":2016,"magnitude":21.4,"components":"A,Wd","discoverer_code":"HTS  11","separation_arcsec":22.7,"position_angle_deg":152},{"measured":2016,"magnitude":21,"components":"A,We","discoverer_code":"HTS  11","separation_arcsec":25,"position_angle_deg":143}],"mass_solar":1.33,"radius_solar":1.54,"spectral_type":"G0","stars_in_system":1,"planets_in_system":1,"surface_temperature_k":6563,"stellar_parameters_method":"NASA Exoplanet Archive composite parameters"},"designations":[],"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."}