{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T21:57:29.103Z","years_from_j2000":26.676,"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-3","name":"HATS-3","class":"f_yellow_white_star","category":"star","object_type":"F yellow-white star","mag":12.433,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":1341.1909023727978,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":312.4574879,"dec_deg":-24.4286938,"epoch_ra_deg":312.852144,"epoch_dec_deg":-24.329065,"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":"Capricornus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hats-3","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20498-2426","companions":[{"measured":2016,"magnitude":19.6,"components":"AB","discoverer_code":"HTS   3","separation_arcsec":3.6,"position_angle_deg":109},{"measured":2016,"magnitude":18.7,"components":"AC","discoverer_code":"HTS   3","separation_arcsec":10.1,"position_angle_deg":310},{"measured":2016,"magnitude":21.4,"components":"AD","discoverer_code":"HTS   3","separation_arcsec":12.7,"position_angle_deg":261},{"measured":2016,"magnitude":19.5,"components":"AE","discoverer_code":"HTS   3","separation_arcsec":14.8,"position_angle_deg":164},{"measured":2016,"magnitude":20.5,"components":"AF","discoverer_code":"HTS   3","separation_arcsec":16.5,"position_angle_deg":247},{"measured":2016,"magnitude":21.3,"components":"AG","discoverer_code":"HTS   3","separation_arcsec":19.9,"position_angle_deg":26},{"measured":2016,"magnitude":20.9,"components":"AH","discoverer_code":"HTS   3","separation_arcsec":21,"position_angle_deg":93},{"measured":2016,"magnitude":17.8,"components":"AI","discoverer_code":"HTS   3","separation_arcsec":25.7,"position_angle_deg":205}],"mass_solar":1.209,"radius_solar":1.404,"spectral_type":"F","stars_in_system":1,"planets_in_system":1,"surface_temperature_k":6351,"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."}