{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T14:40:25.441Z","years_from_j2000":26.675,"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-200465","name":"HD 200465","class":"k3iii_orange_giant","category":"star","object_type":"K3III orange giant","mag":6.5,"mag_band":"V","abs_mag":-0.248,"abs_mag_band":"V","distance_ly":729.6561742197246,"distance_method":"parallax","ra_deg":315.587325,"dec_deg":39.509035,"epoch_ra_deg":315.84385,"epoch_dec_deg":39.614479,"epoch_moved_arcsec":0.061,"pm_ra_mas_yr":2.01,"pm_dec_mas_yr":1.09,"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-200465","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"21023+3931","companions":[{"measured":2018,"magnitude":9.49,"components":"AB","discoverer_code":"H 4 113","separation_arcsec":18.9,"position_angle_deg":299},{"measured":2012,"magnitude":12.5,"components":"AC","discoverer_code":"H 4 113","separation_arcsec":26.7,"position_angle_deg":248},{"measured":2012,"magnitude":15.2,"components":"AI","discoverer_code":"FYM 114","separation_arcsec":41.1,"position_angle_deg":277},{"measured":2015,"magnitude":12.61,"components":"AD","discoverer_code":"SMY   6","separation_arcsec":57,"position_angle_deg":141},{"measured":2018,"magnitude":10.88,"components":"AE","discoverer_code":"SMY   6","separation_arcsec":95.7,"position_angle_deg":87},{"measured":2015,"magnitude":12.45,"components":"AF","discoverer_code":"WRD   4","separation_arcsec":101.8,"position_angle_deg":223},{"measured":2016,"magnitude":11.9,"components":"AG","discoverer_code":"WRD   4","separation_arcsec":101.9,"position_angle_deg":223}],"spectral_type":"K3III","color_index_bv":1.51,"luminosity_solar":109.44602678150797,"metallicity_fe_h":-0.16,"radial_velocity_km_s":-7.6,"spectral_type_source":"SIMBAD (2008ApJS..176..216A, quality C)","surface_temperature_k":3405,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":2.01,"proper_motion_dec_mas_yr":1.09,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 200465"},{"catalog":"HIP","designation":"HIP 103822"}],"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."}