[2] Located in the Florian region,[6] Birgit is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.
[8] The albedo determined by the Wide-field Infrared Survey Explorer (WISE) for this asteroid agrees with that assumption (see below).
In February 2007, a rotational lightcurve of Birgit was obtained from photometric observations by Agnieszka Kryszczyńska at Poznań Observatory, Poland, and international collaborators.
[9][a] The result supersedes observations by Federico Manzini, Roberto Crippa, and Pierre Antonini from August 2005, who determined a poorly rated period of 17.3558±0.0005 hours with an amplitude of 0.25±0.01 magnitude (U=1+).
[10] According to the survey carried out by the NEOWISE mission of NASA's WISE telescope, Birgit measures 7.506±0.110 kilometers in diameter and its surface has an albedo of 0.217±0.027.