Discovered by M. B. Protić MPC designation 1517 Beograd Absolute magnitude 11.1 Discoverer Milorad B. Protić | Discovery date 20 March 1938 Discovered 20 March 1938 Orbits Sun Asteroid group Asteroid belt | |
Alternative names 1938 FD · 1931 VF1934 JF · 1935 ST1942 CD · 1952 JG1952 KM1 · 1971 VT1978 EW6 Minor planet category main-belt (middle) Padua family People also search for 1564 Srbija, 1554 Yugoslavia, 1550 Tito, 1675 Simonida, 1724 Vladimir, Sun, 2244 Tesla, 2348 Michkovitch | ||
01 beobe 1517 beograd
1517 Beograd, provisional designation 1938 FD, is a dark Paduan asteroid from the middle region of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 20 March 1938, by Serbian astronomer Milorad Protić at Belgrade Astronomical Observatory in Serbia. It is named after the city Belgrade.
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Description
Beograd is member of the small Padua family, an asteroid family named after 363 Padua and at least 25 million years old. It consists of mostly X-type asteroids, that were previously associated to 110 Lydia, which is the namesake of the Lydia family. Together with the Agnia family, the Padua family is the only other family to have most of its members in a nonlinear secular resonance configuration with more than 75% of its members in a z1 librating state.
This asteroid orbits the Sun at a distance of 2.6–2.8 AU once every 4 years and 6 months (1,636 days). Its orbit has an eccentricity of 0.05 and an inclination of 5° with respect to the ecliptic. In 1931, Beograd was first identified as 1931 VF at Uccle Observatory, extending the body's observation arc by 7 years prior to its official discovery observation at Belgrade.
French amateur astronomer Laurent Bernasconi obtained a light-curve of Beograd from photometric observations taken in March 2005. Light-curve analysis gave a rotation period of 6.943 hours with a brightness variation of 0.18 magnitude (U=2). In April 2014, a light-curve obtained by Vladimir Benishek at the discovering Belgrade Observatory gave a concurring period of 6.9490 hours with an amplitude of 0.23 magnitude (U=2).
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Beograd measures between 30.97 and 42.00 kilometers in diameter, and its surface has an albedo between 0.036 and 0.07. The Collaborative Asteroid Lightcurve Link adopts the results from IRAS, that is, an albedo of 0.0491 and a diameter of 36.16 kilometers using an absolute magnitude of 11.1. Beograd is classified as an X-type asteroid in the SMASS taxonomy, while NEOWISE classifies it as a reddish P-type due to its low albedo.
This minor planet was named by the discoverer in honor of his native city and the capital of his country, Belgrade. Naming citation was published before November 1977 (M.P.C. 2277).