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1675 Simonida

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Discovered by  M. B. Protić
MPC designation  1675 Simonida
Observation arc  85.83 yr (31,350 days)
Orbits  Sun
Named after  Simonida (Queen)
Asteroid group  Asteroid belt
Discovery date  20 March 1938
Minor planet category  main-belt · Flora
Discovered  20 March 1938
Discoverer  Milorad B. Protić
Asteroid family  Flora family
Alternative names  1938 FB · 1931 AZ 1936 SG · 1941 BD 1943 VJ · 1951 CL1 1953 VD · 1958 FE 1958 GX
Discovery site  Belgrade Astronomical Observatory

1675 Simonida, provisional designation 1938 FB, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 20 March 1938, by Serbian astronomer Milorad Protić at Belgrade Astronomical Observatory. On the same night, Simonida was independently discovered by Belgian astronomer Fernand Rigaux at Uccle Observatory in Belgium.

The S-type asteroid is a member of the Flora family, a large population of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,219 days). Its orbit has an eccentricity of 0.12 and an inclination of 7° with respect to the ecliptic. Simonida's first observation was a precovery taken at Lowell Observatory in 1931, extending the body's observation arc by 7 years prior to its official discovery observation.

In March 1988, Polish astronomer Wiesław Z. Wiśniewski obtained a light-curve of Simonida that gave a rotation period of 5.3 hours with a brightness variation of 0.26 magnitude (U=2). In January 2004, astronomer A. Kryszczynska at Poznań Observatory measured a period of 5.2885 hours with an amplitude of 0.50 magnitude (U=2+). In January 2008, photometric observations by astronomers Martine Castets, Bernard Trégon, Arnaud Leroy and Raoul Behrend gave a rotation period of 5.16 hours with a brightness variation of 0.21 (U=3-).

According to the space-based Japanese Akari satellite, Simonida measures 12.16 kilometers in diameter, and its surface has an albedo of 0.211. The Collaborative Asteroid Lightcurve Link, however, agrees with the results obtained by 8 observations of the Infrared Astronomical Satellite IRAS, that gave a diameter of 11.08 kilometers and an albedo of 0.25 with an absolute magnitude of 11.9.

This minor planet was named for Byzantine princess and queen consort Simonida, the wife of medieval Serbian king Stefan Milutin and symbol of beauty in former Yugoslavia. Naming citation was published before November 1977 (M.P.C. 3359).


1675 Simonida Wikipedia

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