{"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":"2026-09-02T08:18:24.810Z","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-7471","name":"HD 7471","class":"f0_yellow_white_star","category":"star","object_type":"F0 yellow-white star","mag":7.22,"mag_band":"V","abs_mag":1.251,"abs_mag_band":"V","distance_ly":509.6193401824116,"distance_method":"parallax","ra_deg":19.779600000000002,"dec_deg":80.8618,"epoch_ra_deg":20.434141,"epoch_dec_deg":81.002971,"epoch_moved_arcsec":1.217,"pm_ra_mas_yr":45.56,"pm_dec_mas_yr":2.31,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cepheus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-7471","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01191+8052","companions":[{"measured":2021,"magnitude":8.75,"components":"AB","discoverer_code":"STT  28","separation_arcsec":0.9,"position_angle_deg":286},{"measured":2016,"magnitude":6.69,"components":"AB,C","discoverer_code":"STTA 14","separation_arcsec":127.5,"position_angle_deg":24}],"spectral_type":"F0","color_index_bv":0.385,"luminosity_solar":27.516931328087903,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","surface_temperature_k":6462,"proper_motion_ra_mas_yr":45.56,"proper_motion_dec_mas_yr":2.31,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 7471"},{"catalog":"HIP","designation":"HIP 6167"}],"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."}