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Loading contentThe great pre-photographic survey of the northern sky, carried out under Friedrich Argelander at Bonn and published from 1863. It recorded positions and magnitudes for about 325,000 stars to roughly ninth magnitude — the most comprehensive star catalogue of its era — and its 'BD' designations remain in use for naked-eye and telescopic stars today.
Facts on this topic will be cited from these primary and reference sources.
Official naming, definitions, constellation boundaries, and astronomical nomenclature.