Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

This is a low, flat wooden box containing hooks to mount parallax sectors during an observing run. The label inside of box cover says "parallax sectors".

Swarthmore College donated this set of objects to the Museum in 2017.

Collection Item Long Description:

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


Credit Line

Donated by Swarthmore College


Wood, metals, plastic label


3-D: 78.1 × 53.7 × 10.2cm, 5.9kg (2 ft. 6 3/4 in. × 1 ft. 9 1/8 in. × 4 in., 13.1lb.)



Inventory Number