It was discovered on 6 April 1908, by American astronomer Joel Metcalf at the Taunton Observatory (803) in Massachusetts, United States.
[3] Quintilla is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.
Analysis of the best-rated lightcurves by Robert K. Buchheim and Donald Pray (2004), Laurent Bernasconi, Reiner Stoss, Petra Korlević, Maja Hren, Aleksandar Cikota, Ljuban Jerosimic, and Raoul Behrend (2005), as well as Joseph Masiero (2006), gave a well-defined rotation period of (4.552±0.001), (4.5516±0.0002) and (4.552±0.002) hours with a brightness variation of (0.38±0.02), (0.08±0.01) and (0.45±0.2) magnitude, respectively (U=3/3/3).
[15] According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Quintilla measures (31.32±1.20), (36.04±2.1) and (41.210±0.655) kilometers in diameter and its surface has an albedo of (0.220±0.019), (0.1621±0.021) and (0.124±0.012), respectively.
[6][16] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1781 and a diameter of 36.16 kilometers based on an absolute magnitude of 9.7.