{"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":"2026-09-06T16:47:25.716Z","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-195992","name":"HD 195992","class":"f5_yellow_white_star","category":"star","object_type":"F5 yellow-white star","mag":8.22,"mag_band":"V","abs_mag":4.239,"abs_mag_band":"V","distance_ly":203.97526321665188,"distance_method":"parallax","ra_deg":308.333235,"dec_deg":33.389891,"epoch_ra_deg":308.600559,"epoch_dec_deg":33.482173,"epoch_moved_arcsec":5.567,"pm_ra_mas_yr":154.45,"pm_dec_mas_yr":140.28,"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-195992","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20333+3323","companions":[{"measured":2015,"magnitude":15,"components":"AE","discoverer_code":"RAO  71","separation_arcsec":12.5,"position_angle_deg":225},{"measured":2015,"magnitude":11.9,"components":"AB","discoverer_code":"HJ 1535","separation_arcsec":17.2,"position_angle_deg":246},{"measured":2015,"magnitude":13.19,"components":"AC","discoverer_code":"HJ 1535","separation_arcsec":31.9,"position_angle_deg":194},{"measured":2015,"magnitude":11.03,"components":"AD","discoverer_code":"HJ 1535","separation_arcsec":59.1,"position_angle_deg":230}],"spectral_type":"F5","color_index_bv":0.549,"luminosity_solar":1.7554966296212338,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_temperature_k":6075,"proper_motion_ra_mas_yr":154.45,"proper_motion_dec_mas_yr":140.28,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 195992"},{"catalog":"HIP","designation":"HIP 101430"}],"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."}