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Herschel Double Star Catalog

(series of early double star catalogs)

I use Herschel Double Star Catalog to indicate a series of published lists of double stars that William Herschel produced in the late 1700s and early 1800s. Designators based on these lists use an H followed by a Roman numeral that indicates the degree of separation-angle. Herschel was particularly interested in double stars as an aid in uncovering proper motion and parallax. James South and William's son John Herschel later reviewed and edited the list.

(catalog,stars,double stars)
HH V 79Herschel Double Star Catalog 
HJHJ 342Herschel Double Star CatalogJohn Herschel
SHJSHJ 44Herschel Double Star CatalogJohn Herschel/James South