| Discovery[1] | |
|---|---|
| Discovered by | M. Antal |
| Discovery site | Skalnaté Pleso Obs. |
| Discovery date | 20 August 1971 |
| Designations | |
| (1807) Slovakia | |
Named after | Slovakia(country)[2] |
| 1971 QA · 1928 UE 1948 UC · 1951 JA 1951 QK · 1954 NA 1960 GB · 1971 TM1 | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.74 yr (32,046 days) |
| Aphelion | 2.6229AU |
| Perihelion | 1.8289 AU |
| 2.2259 AU | |
| Eccentricity | 0.1784 |
| 3.32yr (1,213 days) | |
| 283.80° | |
| 0° 17m 48.48s / day | |
| Inclination | 3.4919° |
| 236.35° | |
| 140.53° | |
| Physical characteristics | |
| Dimensions | 9.135±0.092 km[4] 9.146±0.059 km[5] 9.40 km(calculated)[3] |
| 24 h(dated)[6] 308.0±0.3 h[7] 308.6 h[3] | |
| 0.20(assumed)[3] 0.3058±0.0411[5] 0.309±0.073[4] | |
| SMASS =S[1] · S[3] | |
| 12.1[5] · 12.5[1][3] · 12.61[7] · 13.06±0.93[8] | |
1807 Slovakia, provisional designation1971 QA, is a stonyasteroid andslow rotator from the inner regions of theasteroid belt, approximately 9 kilometers in diameter. It was discovered on 20 August 1971, by Slovak astronomerMilan Antal atSkalnaté pleso Observatory in theHigh Tatras mountains of Slovakia and named after theSlovak Republic.[2][9]
The asteroid orbits the Sun in theinner main-belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,213 days). Its orbit has aneccentricity of 0.18 and aninclination of 3° with respect to theecliptic.[1]
It was first identified as1928 UE atHeidelberg Observatory in 1928, extending the body'sobservation arc by 43 years prior to its official discovery observation at Skalnaté pleso.[9]
In theSMASS classification,Slovakia is a common stonyS-type asteroid.[1]
Slovakia has anexceptionally longrotation period of 308 hours with a high brightness variation of 1.10magnitude (U=3-).[7] TheCollaborative Asteroid Lightcurve Link (CALL) adopts a period of 308.6 hours with an amplitude of 1.1 magnitude.[3]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Slovakia measures 9.14 kilometers in diameter, and its surface has analbedo of 0.31,[4][5] while CALL assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.40 kilometers with anabsolute magnitude of 12.5[3]
Thisminor planet was named in honor of the now independent state ofSlovakia (Slovak Republic), the country where the discovering observatory is located. At the time Slovakia was still part of the socialistic republic ofCzechoslovakia that was formed after World War I and lasted until the end of the Cold War(also see2315 Czechoslovakia).[2] The officialnaming citation was published by theMinor Planet Center on 15 June 1973 (M.P.C. 3508).[10]
