Discovered by M. B. Protitch Pronunciation sř̩bija Minor planet category main-belt · (outer) Orbits Sun Asteroid group Asteroid belt | Discovery date 15 October 1936 Discovered 15 October 1936 Discoverer Milorad B. Protić MPC designation 1564 | |
Alternative names 1936 TB · 1933 FR11975 TF Discovery site Belgrade Astronomical Observatory People also search for 1517 Beograd, 1675 Simonida | ||
1564 Srbija ([sř̩bija]), provisional designation 1936 TB, is a dark asteroid from the outer region of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 15 October 1936, by Serbian astronomer Milorad Protić at the Belgrade Astronomical Observatory in Serbia.
In the Tholen taxonomy, this C-type asteroid is classified as a X-type asteroid. It orbits the Sun at a distance of 2.5–3.8 AU once every 5 years and 8 months (2,065 days). Its orbit has an eccentricity of 0.20 and an inclination of 11° with respect to the ecliptic. Srbija's observation arc begins 3 years prior to its official discovery observation with its first identification as 1933 FR1 at Heidelberg in 1933.
Astronomers Maryanne Angliongto and Milan Mijic at Cal State LA, United States, obtained a rotational light-curve of Srbija in May 2006. It gave a rotation period of 29.64 hours with a brightness variation of 0.37 magnitude (U=2). In November 2009, photometric observations by James W. Brinsfield at Via Capote Observatory, California, gave a shorter period of 9.135 hours with an amplitude of 0.17 (U=3).
According to the space-based surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Srbija measures between 29.48 and 43.23 kilometers in diameter, and its surface has an albedo between 0.042 and 0.10. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 37.12 kilometers using an absolute magnitude of 10.88.
This minor planet was named in honour of the now sovereign state of Serbia in its transliterated native pronunciation (Serbian: Србија / Srbija). Srbija's discovery in 1936 was the first minor planet discovery made at Belgrade Observatory. Naming citation was published before November 1977 (M.P.C. 844).