Discovered by K. Reinmuth MPC designation 1665 Gaby Discovered 27 February 1930 Asteroid group Asteroid belt | Discovery date 27 February 1930 Minor planet category main-belt · (inner) Orbits Sun Discoverer Karl Wilhelm Reinmuth | |
Named after Gaby Reinmuth(daughter-in-law of)Karl Reinmuth Alternative names 1930 DQ · 1941 BC1949 HS · 1951 WQ1957 KF Discovery site Landessternwarte Heidelberg-Königstuhl Similar 1862 Apollo, Sun, 1419 Danzig, 1056 Azalea, 1111 Reinmuthia | ||
1665 Gaby, provisional designation 1930 DQ, is a stony asteroid and a relatively slow rotator from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 27 February 1930, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.
The S-type asteroid orbits the Sun at a distance of 1.9–2.9 AU once every 3 years and 9 months (1,370 days). Its orbit has an eccentricity of 0.21 and an inclination of 11° with respect to the ecliptic. No precoveries were taken, and no prior identifications were made of Gaby. The body's observation arc begins 2 months after its official discovery observation at Heidelberg.
In February 2005, French amateur astronomer Laurent Bernasconi obtained a rotational light-curve of Gaby from photometric observations. It gave a rotation period of 66 hours with a brightness variation of 0.27 magnitude (U=2). This is a longer-than average rotation, since most minor planets have a period between 2 and 20 hours (see list). In 2016, concurring sidereal periods of 67.905 and 67.911 hours were obtained from modeled photometric observations derived from the Lowell Photometric Database and other sources (U=n.a.).
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Gaby measures between 10.75 and 11.01 kilometers in diameter, and its surface has an albedo between 0.253 and 0.278. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE data with an albedo of 0.2532 and a diameter of 11.01 kilometers using an absolute magnitude of 7001119000000000000♠11.9±0.2.
This minor planet was named by the discoverer for his daughter-in-law, Gaby Reinmuth. Naming citation was published before November 1977 (M.P.C. 2901).