{"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":"2026-09-06T02:58:48.691Z","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-234806","name":"HD 234806","class":"a5_white_star","category":"star","object_type":"A5 white star","mag":9.7,"mag_band":"V","abs_mag":3.305,"abs_mag_band":"V","distance_ly":620.0692620887874,"distance_method":"parallax","ra_deg":286.922415,"dec_deg":50.950562,"epoch_ra_deg":287.089427,"epoch_dec_deg":50.99214,"epoch_moved_arcsec":0.199,"pm_ra_mas_yr":6.34,"pm_dec_mas_yr":3.94,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Draco","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-234806","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19077+5057","companions":[{"measured":2021,"magnitude":12,"components":"AB","discoverer_code":"ES  979","separation_arcsec":8.3,"position_angle_deg":194},{"measured":2021,"magnitude":11.56,"components":"AC","discoverer_code":"ES  979","separation_arcsec":19.2,"position_angle_deg":47},{"measured":2015,"magnitude":13.39,"components":"AD","discoverer_code":"ABH 109","separation_arcsec":48.9,"position_angle_deg":332},{"measured":2015,"magnitude":15.63,"components":"AE","discoverer_code":"ABH 109","separation_arcsec":57.5,"position_angle_deg":86},{"measured":2015,"magnitude":14.9,"components":"AG","discoverer_code":"ABH 109","separation_arcsec":67.9,"position_angle_deg":185},{"measured":2015,"magnitude":15.74,"components":"AF","discoverer_code":"ABH 109","separation_arcsec":70.2,"position_angle_deg":248}],"spectral_type":"A5","color_index_bv":0.22,"luminosity_solar":4.149540426343628,"variable_mag_max":9.602,"variable_mag_min":9.762,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1993yCat.3135....0C, quality E)","proper_motion_ra_mas_yr":6.34,"proper_motion_dec_mas_yr":3.94},"designations":[{"catalog":"HD","designation":"HD 234806"},{"catalog":"HIP","designation":"HIP 93943"}],"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."}