5.25-inch objective with photographic correcting lens
Date: 1869
Inventory Number: 1996-1-0486
Classification: Objective
Attributed to: Alvan Clark and Sons (1846 - 1958)
User: Oak Ridge Station (1931 - 2005)
User: George R. Agassiz Station, Harvard (1951 - 1982)
User: Harvard College Observatory (founded 1839)
Cultural Region:
Place of Origin:
Dimensions:
16.8 × 16.8 × 5.8 cm (6 5/8 × 6 5/8 × 2 5/16 in.)
Description:
5.25 inch objective lens in cell with another lens attached.
Signedunsigned
Historical AttributesIn 1869, the Clarks completed an equatorial telescope for the Harvard College Observatory. It was known as the West Equatorial. It had an aperture of 5.25 inches and a 7.5-foot focal length. It was taken by George Clark and John Whipple to Shelbyville, Kentucky to photograph the solar eclipse of 1869.
This may be the objective cell and correcting lenses for that telescope.
This may be the objective cell and correcting lenses for that telescope.
ProvenanceHarvard College Observatory, Agassiz Station; transferred to CHSI, 1981.