_Yugoslavia.png) Shape model of Yugoslavia from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | M. B. Protitch |
| Discovery site | Belgrade Observatory |
| Discovery date | 6 September 1940 |
| Designations | |
| (1554) Yugoslavia | |
Named after | Yugoslavia (country, 20th century)[2] |
| 1940 RE · 1932 YA 1935 JN · 1936 UH 1948 MH | |
| main-belt · Eunomia[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.98 yr (30,672 days) |
| Aphelion | 3.1486AU |
| Perihelion | 2.0889 AU |
| 2.6188 AU | |
| Eccentricity | 0.2023 |
| 4.24yr (1,548 days) | |
| 62.174° | |
| 0° 13m 57.36s / day | |
| Inclination | 12.151° |
| 217.12° | |
| 131.60° | |
| Physical characteristics | |
| Dimensions | 14.73±1.13 km[4] 15.94 km(calculated)[3] 16.185±0.107 km[5] 17.198±0.160 km[6] 21.39±1.31 km[7] |
| 3.8876±0.0001h[8] 3.8879±0.0003 h[9] 3.89±0.01 h[10] | |
| 0.070±0.009[7] 0.1043±0.0145[6] 0.117±0.026[5] 0.21(assumed)[3] 0.269±0.048[4] | |
| S[3] | |
| 11.20[4] · 11.3[1][3] · 11.9[7][6] | |
1554 Yugoslavia (provisional designation1940 RE) is a stony Eunomianasteroid from the middle region of theasteroid belt, approximately 16 kilometres (9.9 mi) in diameter. It was discovered by Serbian astronomerMilorad Protić atBelgrade Astronomical Observatory, Serbia, on 6 September 1940.[11] It was named for the former country ofYugoslavia.[2]
The asteroid is a member of theEunomia family, a large group of mostly stonyS-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun in thecentral main-belt at a distance of 2.1–3.1 AU once every 4 years and 3 months (1,548 days). Its orbit has aneccentricity of 0.20 and aninclination of 12° with respect to theecliptic.[1] Yugoslavia was first identified as1932 YA atUccle Observatory in 1932. Itsobservation arc begins 4 year prior to its official discovery observation, with aprecovery taken atNice Observatory in 1936.[11]
From 2007 to 2012, several photometriclightcurve observations of Yugoslavia established a well-definedrotation period of 3.89 hours with a brightness variation between 0.64 and 0.74magnitude (U=3/3/3).[8][9][10]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, Yugoslavia measures between 14.73 and 21.39 kilometers in diameter, and its surface has analbedo between 0.070 and 0.269.[4][5][6][7] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from15 Eunomia, the family's largest member and namesake – and calculates a diameter of 15.94 kilometers with anabsolute magnitude of 11.3.[3]
Thisminor planet was named after the former country ofYugoslavia.[2] The officialnaming citation was published by theMinor Planet Center on 30 January 1964 (M.P.C. 2277).[12]
