1564 Srbija
Discovery[1]
Discovered byM. B. Protitch
Discovery siteBelgrade Obs.
Discovery date15 October 1936
Designations
(1564) Srbija
Pronunciationsř̩bija
Named after
Serbia (country)[2]
1936 TB · 1933 FR1
1975 TF
main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc84.10 yr (30,718 days)
Aphelion3.8016 AU
Perihelion2.5547 AU
3.1782 AU
Eccentricity0.1962
5.67 yr (2,070 days)
141.69°
0° 10m 26.4s / day
Inclination11.011°
177.60°
230.17°
Physical characteristics
Dimensions29.48±8.22 km[4]
30.23±8.42 km[5]
37.12 km (calculated)[3]
39.32±1.43 km[6]
41.681±1.170 km[7]
43.232±0.423 km[8]
9.135±0.001 h[9]
29.64±0.02 h[10]
0.0420±0.0092[8]
0.045±0.005[7]
0.051±0.004[6]
0.057 (assumed)[3]
0.09±0.06[4]
0.10±0.08[5]
Tholen = X[1] · C[3][11]
B–V = 0.698[1]
U–B = 0.331[1]
10.77±0.30[11] · 10.82[5] · 10.88[1][3][4][6][8]

    1564 Srbija (IPA: [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.[12] It is named for the country of Serbia.[2]

    Classification and orbit

    The C-type asteroid is also classified as an X-type in the Tholen taxonomy. It orbits the Sun in the outer main-belt at a distance of 2.5–3.8 AU once every 5 years and 8 months (2,070 days). Its orbit has an eccentricity of 0.20 and an inclination of 11° with respect to the ecliptic.[1] Srbija's observation arc begins 3 years prior to its official discovery observation with its first identification as 1933 FR1 at Heidelberg in 1933.[12]

    Physical characteristics

    Astronomers Maryanne Angliongto and Milan Mijic at Cal State LA, United States, obtained a rotational lightcurve of Srbija in May 2006. It gave a rotation period of 29.64 hours with a brightness variation of 0.37 magnitude (U=2).[10] In November 2009, photometric observations by James W. Brinsfield at Via Capote Observatory (G69), California, gave a shorter period of 9.135 hours with an amplitude of 0.17 (U=3).[9]

    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.[4][5][6][7][8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 37.12 kilometers with an absolute magnitude of 10.88.[3]

    Naming

    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.[2] The official naming citation was published by the Minor Planet Center in December 1952 (M.P.C. 844).[13]

    References

    1. 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 1564 Srbija (1936 TB)" (2017-05-01 last obs.). Jet Propulsion Laboratory. Retrieved 30 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1564) Srbija". Dictionary of Minor Planet Names – (1564) Srbija. Springer Berlin Heidelberg. p. 124. doi:10.1007/978-3-540-29925-7_1565. ISBN 978-3-540-00238-3.
    3. 1 2 3 4 5 6 "LCDB Data for (1564) Srbija". Asteroid Lightcurve Database (LCDB). Retrieved 30 December 2016.
    4. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. S2CID 9341381. Retrieved 30 December 2016.
    5. 1 2 3 4 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
    6. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
    7. 1 2 3 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. S2CID 119293330. Retrieved 30 December 2016.
    8. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 35447010.
    9. 1 2 Brinsfield, James W. (April 2010). "Asteroid Lightcurve Analysis at Via Capote Observatory: 4th Quarter 2009". The Minor Planet Bulletin. 37 (2): 50–53. Bibcode:2010MPBu...37...50B. ISSN 1052-8091. Retrieved 30 December 2016.
    10. 1 2 Angliongto, Maryanne; Mijic, Milan (June 2007). "First Period Determination for Asteroid 1564 Srbija". The Minor Planet Bulletin. 34 (2): 28. Bibcode:2007MPBu...34...28A. ISSN 1052-8091. Retrieved 30 December 2016.
    11. 1 2 Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 30 December 2016.
    12. 1 2 "1564 Srbija (1936 TB)". Minor Planet Center. Retrieved 30 December 2016.
    13. ↑ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. Bibcode:2009dmpn.book.....S. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.
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