 According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, "Geertruida" measures between 15.621 and 23.572 kilometers in diameter and its surface has an albedo between 0.030 and 0.095.The "Collaborative Asteroid Lightcurve Link" derives an albedo of 0.0510, typical for that of a carbonaceous asteroid, and a diameter of 23.43 kilometers based on an absolute magnitude of 12.0.This minor planet was named by Dutch astronomer Gerrit Pels after his sister Geertruid (or Geertruida) Hamerslag Pels.