Letter from Sir George Biddell Airy, Royal Observatory Greenwich, to William M. Dobie [address unknown].

Airy comments on how the companion of the star alpha Aquilae has been repeatedly obscured from 1781 to 1862, as recorded by W. Herschel, Struve, J. Herschel, Smythe, and Piazzi Smythe. Estimates the magnitude and distance.

Record Details

Item reference: AGC/A/4/10
Catalogue Section: Manuscript documents acquired singly by the Museum
Level: ITEM
Extent: 1 letter
Date made: 1863-08-17
Creator: Airy, George Biddell
Credit: National Maritime Museum, Greenwich, London