| Discovery[1] | |
|---|---|
| Discovered by | L. G. Karachkina |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 21 October 1982 |
| Designations | |
| (5316) Filatov | |
Named after | Vladimir Filatov (ophthalmologist andsurgeon)[2] |
| 1982 UB7 · 1982 XU3 1987 SF9 · 1991 LV3 | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 34.44 yr (12,578 days) |
| Aphelion | 3.2253AU |
| Perihelion | 3.0919 AU |
| 3.1586 AU | |
| Eccentricity | 0.0211 |
| 5.61yr (2,050 days) | |
| 18.907° | |
| 0° 10m 32.16s / day | |
| Inclination | 14.743° |
| 230.22° | |
| 240.87° | |
| Physical characteristics | |
| Dimensions | 22.95 km(calculated)[3] 45.693±0.511 km[4] |
| 1061.3756±76.36h[5] | |
| 0.019±0.003[4] 0.057(assumed)[3] | |
| C[3] | |
| 11.474±0.002(R)[5] · 11.60[4] · 11.8[1] · 11.92[3] · 11.97±0.48[6] | |
5316 Filatov, provisional designation1982 UB7, is a carbonaceousasteroid and potentiallyslow rotator from the outer region of theasteroid belt, approximately 30 kilometers in diameter.
The asteroid was discovered on 21 October 1982, by Russian astronomerLyudmila Karachkina at theCrimean Astrophysical Observatory in Nauchnij on the Crimean peninsula.[7] It was later named for surgeonVladimir Filatov.[2]
Filatov orbits the Sun in theouter main-belt at a distance of 3.1–3.2 AU once every 5 years and 7 months (2,050 days). Its orbit has aneccentricity of 0.02 and aninclination of 15° with respect to theecliptic.[1] The body'sobservation arc begins at Nauchnij, 2 days after its official discovery observation.[7]
In November 2010, a rotationallightcurve ofFilatov was obtained from photometric observations in the R-band at thePalomar Transient Factory in California. It gave an exceptionally longrotation period of 1061 hours with a brightness variation of 0.07magnitude (U=1).[5]
However, the fragmentary lightcurve has received a low quality rating by theCollaborative Asteroid Lightcurve Link which means that the result could be completely wrong(also seepotentially slow rotator).[3][5]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Filatov measures 45.69 kilometers in diameter, and its surface has analbedo of 0.019,[4] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo forcarbonaceous asteroids of 0.057 and calculates a diameter of 22.95 kilometers with anabsolute magnitude of 11.92.[3]
Thisminor planet was named in honor ofVladimir Filatov (1875–1956), a Russian and Ukrainianophthalmologist andsurgeon.[2] The official naming citation was published by theMinor Planet Center on 1 September 1993 (M.P.C. 22508).[8]
