{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T05:34:08.360Z","years_from_j2000":26.669,"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-22764","name":"HD 22764","class":"k3_5iiib_g_orange_giant","category":"star","object_type":"K3.5IIIb+G orange giant","mag":5.74,"mag_band":"V","abs_mag":-3.267,"abs_mag_band":"V","distance_ly":2064.2808963963284,"distance_method":"parallax","ra_deg":55.678065,"dec_deg":59.969391,"epoch_ra_deg":56.234461,"epoch_dec_deg":60.055001,"epoch_moved_arcsec":0.075,"pm_ra_mas_yr":0.56,"pm_dec_mas_yr":2.75,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Camelopardalis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-22764","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"03427+5958","companions":[{"measured":2011,"magnitude":13.8,"components":"AB","discoverer_code":"WEB   2","separation_arcsec":23.4,"position_angle_deg":98},{"measured":2011,"magnitude":13,"components":"AC","discoverer_code":"WEB   2","separation_arcsec":34.5,"position_angle_deg":303},{"measured":2019,"magnitude":8.45,"components":"AD","discoverer_code":"WEB   2","separation_arcsec":54.8,"position_angle_deg":36},{"measured":2003,"magnitude":11.82,"components":"AE","discoverer_code":"WEB   2","separation_arcsec":168.4,"position_angle_deg":162}],"spectral_type":"K3.5IIIb+G","uncertainties":{"metallicity_fe_h":[0.115,0.115]},"color_index_bv":1.736,"luminosity_solar":1765.2247174525573,"metallicity_fe_h":-0.075,"radial_velocity_km_s":-10,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality C)","surface_gravity_log_g":0.67,"surface_temperature_k":4108,"metallicity_fe_h_source":"Median of 2 spectroscopic determinations in 2 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":0.56,"proper_motion_dec_mas_yr":2.75,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 22764"},{"catalog":"HIP","designation":"HIP 17342"},{"catalog":"HR","designation":"HR 1112"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}