1707 Chantal
1707 Chantal, provisional designation , is a stony background asteroid from the Florian region in the inner asteroid belt, approximately in diameter. It was discovered on 8 September 1932, by astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. The S-type asteroid has a rotation period of at least 10 hours. It was named for Chantal, the niece of Belgian astronomer Georges Roland. Orbit and classification. According to modern HCM-analyses by Nesvorný, as well as by Milani and Knežević, "Chantal" is a non-family asteroid from the main belt's background population. In an older  HCM-analysis (Zappalà (1990–97), it is a member of the Flora family (), a giant asteroid family and the largest family of stony asteroids in the main-belt. It orbits the Sun in the inner asteroid belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,207 days; semi-major axis of 2.22 AU). Its orbit has an eccentricity of 0.17 and an inclination of 4° with respect to the ecliptic. The asteroid was first observed as at the Heidelberg Observatory in December 1906. The body's observation arc begins at Uccle Observatory in October 1932 , or seven weeks after its official discovery observation. Naming. This minor planet was named by the discoverer Eugène Delporte after Chantal, a niece of Belgian astronomer Georges Roland (1922–1991) at of Uccle and co-discoverer of the Comet Arend–Roland. The official naming citation was published by the Minor Planet Center on 8 April 1982 (). Asteroid 1711 Sandrine was also named by the discoverer after a (grand)-niece of Roland. Physical characteristics. In the Tholen classification, "Chantal" is a common, stony S-type asteroid. Rotation period. In October 1975, a rotational lightcurve of "Chantal" was obtained from photometric observations by Swedish  astronomer Claes-Ingvar Lagerkvist at the Uppsala Astronomical Observatory. Analysis of the fragmentary lightcurve gave a rotation period of at least hours with a brightness amplitude of more than 0.2 magnitude (). Diameter and albedo. According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, "Chantal" measures between 7.46 and 7.62 kilometers in diameter and its surface has an albedo between 0.28 and 0.31. The "Collaborative Asteroid Lightcurve Link" assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 9.23 kilometers based on an absolute magnitude of 12.54