{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T14:56:53.142Z","years_from_j2000":26.683,"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-176051","name":"HD 176051","class":"f9v_k1v_yellow_white_main_sequence_star","category":"star","object_type":"F9V+K1V yellow-white main-sequence star","mag":5.2,"mag_band":"V","abs_mag":4.338,"abs_mag_band":"V","distance_ly":48.5063026504118,"distance_method":"parallax","ra_deg":284.256615,"dec_deg":32.901273,"epoch_ra_deg":284.508497,"epoch_dec_deg":32.935133,"epoch_moved_arcsec":6.637,"pm_ra_mas_yr":202.85,"pm_dec_mas_yr":-143.97,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lyra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-176051","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"18570+3254","companions":[{"measured":2023,"magnitude":7.96,"components":"AB","discoverer_code":"BU  648","separation_arcsec":1.1,"position_angle_deg":224},{"measured":2015,"magnitude":null,"components":"AG","discoverer_code":"BU  648","separation_arcsec":2.1,"position_angle_deg":117},{"measured":2015,"magnitude":null,"components":"AH","discoverer_code":"BU  648","separation_arcsec":2.2,"position_angle_deg":104},{"measured":2015,"magnitude":null,"components":"AI","discoverer_code":"BU  648","separation_arcsec":3.3,"position_angle_deg":89},{"measured":2015,"magnitude":null,"components":"AJ","discoverer_code":"BU  648","separation_arcsec":4.3,"position_angle_deg":105},{"measured":2015,"magnitude":11,"components":"AB,C","discoverer_code":"BU  648","separation_arcsec":76.3,"position_angle_deg":293},{"measured":2014,"magnitude":12.2,"components":"AB,D","discoverer_code":"BU  648","separation_arcsec":83.9,"position_angle_deg":201},{"measured":2015,"magnitude":12.6,"components":"AF","discoverer_code":"BU  648","separation_arcsec":85.9,"position_angle_deg":78},{"measured":2015,"magnitude":12.5,"components":"AE","discoverer_code":"BU  648","separation_arcsec":124.8,"position_angle_deg":318}],"spectral_type":"F9V+K1V","uncertainties":{"metallicity_fe_h":[0.13,0.13]},"color_index_bv":0.594,"luminosity_solar":1.6025072388814185,"metallicity_fe_h":-0.13,"radial_velocity_km_s":-45.8,"spectral_type_source":"SIMBAD (1976AJ.....81..245E, quality C)","surface_gravity_log_g":4.6,"surface_temperature_k":5990,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":202.85,"proper_motion_dec_mas_yr":-143.97,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Gliese","designation":"Gl 738A"},{"catalog":"HD","designation":"HD 176051"},{"catalog":"HIP","designation":"HIP 93017"},{"catalog":"HR","designation":"HR 7162"}],"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."}