DASCH: Digital Access to a Sky Century @ Harvard
Legacy Cannon Site — Avoid If Possible

Search the Photographic Plate Collection

This website is no longer supported. Due to lack of resources there is no guarantee of how long this server will stay online. All DASCH users should transition to the new cloud-based data access services documented on the main DASCH website. Not only are those systems going to be the focus of all future maintenance effort, they are much more powerful, usable, and correct than this website.

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.


(* = Required)
Specify plate series and/or number to limit search for above object.



J2000 B1950
(hh:mm:ss.sss)
(dd:mm:ss.sss)
(* = Required)
Specify plate series and/or number to limit search for above coordinates.





(20000 or less)
(600 or less arcsecs)
(yyyy-mm-dd or year. frac)
(yyyy-mm-dd or year. frac)

WCS Fitted Plates Scanned Plates Unscanned Plates Entire Database
Search inner spatial bins of unfitted plates
(20000 or less)

Heliocentric Julian UT
Sexigesimal Decimal

FITS JPEG
TAR ZIP

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