3917 Franz Schubert

3917 Franz Schubert, provisional designation, is a bright background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 15 February 1961, by astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Germany. The asteroid was named after Austrian composer Franz Schubert.

Orbit and classification
Franz Schubert is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner main-belt at a distance of 2.3–2.4 AU once every 3 years and 7 months (1,323 days; semi-major axis of 2.36 AU). Its orbit has an eccentricity of 0.02 and an inclination of 2° with respect to the ecliptic.

The body's observation arc begins with its official discovery observation at Tautenburg in February 1961.

Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Franz Schubert measures 5.129 kilometers in diameter and its surface has a high albedo of 0.321.

Rotation period
As of 2017, no rotational lightcurve of Franz Schubert has been from photometric observations. The asteroid's rotation period, shape and poles remain unknown.

Naming
This minor planet was named after Austrian composer Franz Schubert (1797–1828). The official naming citation was published by the Minor Planet Center on 20 February 1989 (M.P.C. 14208).