Dudley Observatory

515 Loudon Road
Siena College, Roger Bacon Hall, Room 212
Loudonville, New York 12211
Phone: (518) 782-6885

Dudley Observatory


The Dudley Observatory is a 160-year-old astronomical institution located in the Capital Region of Upstate New York. Its collections are currently housed at the New York State Library, New York State Museum, Siena College, and Union College. These collections include the original telescopes, timepieces, institutional archives, astronomical research library, and a number of films created or collected during the Observatory's history.

Please note: Many of the Observatory's collections were dispersed to various other repositories when the Observatory moved to Siena College in 2019. The Holding Institution listed in the metadata may not be accurate for all items. 


Dudley Observatory is a member of the Capital District Library Council.


Dudley Observatory Artifacts

This collection contains images of artifacts and people related to the Dudley Observatory.

Dudley Observatory Historical Archives

This collection contains artifacts relating to the history of the Dudley Observatory.

Micro-meteorite Collecting

Dudley launched probes and balloons into the upper atmosphere in order to collect and examine the micro-meteorites to be found there. This collection contains documentation from this process.

San Luis Observatory

This collection contains materials related to the San Luis project.