{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T19:03:29.474Z","years_from_j2000":26.684,"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-120476","name":"HD 120476","class":"k4v_k6v_orange_dwarf","category":"star","object_type":"K4V+K6V orange dwarf","mag":7.05,"mag_band":"V","abs_mag":6.413,"abs_mag_band":"V","distance_ly":43.73235174977182,"distance_method":"parallax","ra_deg":207.266775,"dec_deg":26.979911,"epoch_ra_deg":207.573562,"epoch_dec_deg":26.845401,"epoch_moved_arcsec":11.654,"pm_ra_mas_yr":-427.38,"pm_dec_mas_yr":-89.94,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Boötes","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-120476","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"13491+2659","companions":[{"measured":2025,"magnitude":8.15,"components":null,"discoverer_code":"STF1785","separation_arcsec":2.5,"position_angle_deg":197}],"spectral_type":"K4V+K6V","uncertainties":{"metallicity_fe_h":[0.099,0.099]},"color_index_bv":1.11,"luminosity_solar":0.23702818991297786,"metallicity_fe_h":0.07,"radial_velocity_km_s":-20.7,"spectral_type_source":"SIMBAD (2013MNRAS.428.3104E, quality C)","surface_gravity_log_g":4.33,"surface_temperature_k":4530,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-427.38,"proper_motion_dec_mas_yr":-89.94,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Gliese","designation":"Gl 528A"},{"catalog":"HD","designation":"HD 120476"},{"catalog":"HIP","designation":"HIP 67422"}],"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."}