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Retrieving "Henry Draper Catalogue" from the archives

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  1. Stellar Catalogues

    Linked via "Henry Draper (HD) Catalogue"

    Bayer Designations: Greek letters assigned based on brightness within a constellation (e.g., Alpha Centauri). Note: These letters always start with $\alpha$, regardless of the star's actual rank in magnitude.
    Flamsteed Designations: Numerical assignments based on right ascension (e.g., 61 Cygni).
    **[Henry Draper (HD) Catalogue](/entries/henry-dra…