{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T15:14:30.402Z","years_from_j2000":26.673,"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-193322","name":"HD 193322","class":"o9iv_n_b1_5v_blue_subgiant","category":"star","object_type":"O9IV(n)+B1.5V blue subgiant","mag":5.83,"mag_band":"V","abs_mag":-3.043,"abs_mag_band":"V","distance_ly":1941.407025749967,"distance_method":"parallax","ra_deg":304.529115,"dec_deg":40.732082,"epoch_ra_deg":304.765964,"epoch_dec_deg":40.815136,"epoch_moved_arcsec":0.187,"pm_ra_mas_yr":-2.51,"pm_dec_mas_yr":-6.53,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-193322","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20181+4044","companions":[{"measured":2018,"magnitude":6.8,"components":"Aa,Ab","discoverer_code":"CHR  96","separation_arcsec":0.1,"position_angle_deg":151},{"measured":2023,"magnitude":8.24,"components":"AB","discoverer_code":"STF2666","separation_arcsec":2.9,"position_angle_deg":245},{"measured":2006,"magnitude":10.7,"components":"AC","discoverer_code":"STF2666","separation_arcsec":34,"position_angle_deg":207},{"measured":2006,"magnitude":11,"components":"AD","discoverer_code":"TAR   5","separation_arcsec":49.6,"position_angle_deg":181}],"spectral_type":"O9IV(n)+B1.5V","color_index_bv":0.073,"luminosity_solar":1436.1506529074773,"radial_velocity_km_s":-7,"spectral_type_source":"SIMBAD (2014yCat....1.2023S, quality C)","proper_motion_ra_mas_yr":-2.51,"proper_motion_dec_mas_yr":-6.53},"designations":[{"catalog":"HD","designation":"HD 193322"},{"catalog":"HIP","designation":"HIP 100069"},{"catalog":"HR","designation":"HR 7767"}],"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."}