From:
Thomas Henderson
To:
Sir John Herschel
Date:
[5 April 1843]
Source of text:
RS:HS 9.303
Summary:
Sending readings from his observations of the comet.
Contributor:
John Herschel Project
Showing 1–2 of 2 items
Sending readings from his observations of the comet.
Comments on JH's positive calotype. Suggests comet may be return of (J.-D.) Cassini's comet of 1668. Gives theorem for finding parabolic orbit of comet if two observations are made in the ecliptic.