{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T21:52:03.152Z","years_from_j2000":26.681,"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":"hd-265345","name":"HD 265345","class":"g0_yellow_star","category":"star","object_type":"G0 yellow star","mag":9.4,"mag_band":"V","abs_mag":2.916,"abs_mag_band":"V","distance_ly":645.8542068419399,"distance_method":"parallax","ra_deg":103.269405,"dec_deg":31.462356,"epoch_ra_deg":103.702786,"epoch_dec_deg":31.42969,"epoch_moved_arcsec":0.354,"pm_ra_mas_yr":-13.05,"pm_dec_mas_yr":-2.41,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Gemini","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-265345","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06531+3128","companions":[{"measured":2015,"magnitude":11.39,"components":"AB","discoverer_code":"SEI 466","separation_arcsec":29.7,"position_angle_deg":154},{"measured":2015,"magnitude":12.26,"components":"AC","discoverer_code":"SIN  23","separation_arcsec":56.4,"position_angle_deg":151},{"measured":2015,"magnitude":15.05,"components":"AD","discoverer_code":"SIN  23","separation_arcsec":57.5,"position_angle_deg":62},{"measured":2015,"magnitude":15.36,"components":"AE","discoverer_code":"SIN  23","separation_arcsec":95.5,"position_angle_deg":341},{"measured":2015,"magnitude":13.85,"components":"AF","discoverer_code":"SIN  23","separation_arcsec":113,"position_angle_deg":312},{"measured":2015,"magnitude":14.8,"components":"AG","discoverer_code":"SIN  23","separation_arcsec":153.4,"position_angle_deg":103},{"measured":2015,"magnitude":14.06,"components":"AH","discoverer_code":"SIN  23","separation_arcsec":202.1,"position_angle_deg":85}],"spectral_type":"G0","color_index_bv":0.504,"luminosity_solar":5.937450473021952,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","proper_motion_ra_mas_yr":-13.05,"proper_motion_dec_mas_yr":-2.41},"designations":[{"catalog":"HD","designation":"HD 265345"},{"catalog":"HIP","designation":"HIP 33047"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"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."}