{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T00:21:03.933Z","years_from_j2000":26.679,"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-178443","name":"HD 178443","class":"f8_yellow_white_star","category":"star","object_type":"F8 yellow-white star","mag":9.99,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":287.65357500000005,"dec_deg":-43.276718,"epoch_ra_deg":288.132292,"epoch_dec_deg":-43.23334,"epoch_moved_arcsec":1.404,"pm_ra_mas_yr":-2.46,"pm_dec_mas_yr":-52.58,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Corona Australis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-178443","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19106-4316","age_years":345798460,"companions":[{"measured":1936,"magnitude":13.8,"components":"AB","discoverer_code":"DON 950","separation_arcsec":3.2,"position_angle_deg":166},{"measured":2000,"magnitude":14.8,"components":"AB,C","discoverer_code":"DAM 674","separation_arcsec":10,"position_angle_deg":330},{"measured":2000,"magnitude":15.3,"components":"AB,D","discoverer_code":"DAM 674","separation_arcsec":11.9,"position_angle_deg":104},{"measured":2000,"magnitude":12.1,"components":"AB,E","discoverer_code":"DAM 674","separation_arcsec":17.6,"position_angle_deg":97}],"mass_solar":3.088,"radius_solar":9.5,"spectral_type":"F8","uncertainties":{"metallicity_fe_h":[0.04,0.04]},"color_index_bv":0.698,"metallicity_fe_h":-2.03,"variable_mag_max":9.91,"variable_mag_min":10.08,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality E)","surface_gravity_log_g":2.858,"surface_temperature_k":6266,"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":-2.46,"proper_motion_dec_mas_yr":-52.58,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":108.975},"designations":[{"catalog":"HD","designation":"HD 178443"},{"catalog":"HIP","designation":"HIP 94196"}],"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."}