Search the Photographic Plate Collection
The digitized images of the Harvard College Observatory's Photographic Plate Archive may be searched by object identifier, celestial coordinates, date range, or by plate number.
Blank fields imply a wildcard. Only one exposure is displayed for each scanned or fitted plate. Use the browser "stop" button to interrupt the search.
(yyyy-mm-dd or year. frac)
WCS Fitted Plates Scanned Plates Unscanned Plates Entire Database
Search inner spatial bins of unfitted plates
Heliocentric Julian UT