120375 Kugel, provisional designation: 2005 PB₆, is a background asteroid from the inner regions of the asteroid belt, approximately 1 kilometer (0.6 miles) in diameter. It was discovered on 10 August 2005, by French amateur astronomer Claudine Rinner at her Ottmarsheim Observatory (224) in France.^[1] The stony S/Q-type asteroid in the region of the Florian clan has a tentative rotation period of 6.9 hours.^[5] It was named after French astronomer François Kugel.^[1]

Kugel is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.^[3][4] Based on osculating Keplerian orbital elements, the asteroid has also been considered a member of the Flora family (402), a giant asteroid clan and the largest family of stony asteroids in the main belt.^[5]

It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.8 AU once every 3 years and 6 months (1,289 days; semi-major axis of 2.32 AU). Its orbit has an eccentricity of 0.22 and an inclination of 3° with respect to the ecliptic.^[2] The body's observation arc begins with its first observation as 1998 SM₁₀₈ at Lincoln Laboratory ETS in September 1998, nearly 7 years prior to its official discovery observation at Ottmarsheim.^[1]

This minor planet was named after French amateur astronomer François Kugel (born 1959), an active observer of comets and a collaborator of the discoverer. He has founded the Chante-Perdrix Observatory (A77) in 2005.^[1] The official naming citation was published by the Minor Planet Center on 6 August 2009 (M.P.C. 66728).^[8]

In the SDSS-based taxonomy, Kugel has an SQ-type that transitions between the common S-type and less common Q-type asteroids.^[7]