(79983) 1999 DF9
| Discovery | |
|---|---|
| Discovered by | J. X. Luu C. Trujillo D. C. Jewitt |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 20 February 1999 |
| Designations | |
| (79983) 1999 DF9 | |
| 1999 DF9 | |
| TNO · cubewano | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 17.06 yr (6,231 days) |
| Aphelion | 53.567 AU |
| Perihelion | 39.830 AU |
| 46.698 AU | |
| Eccentricity | 0.1471 |
| 319.12 yr (116,560 days) | |
| 19.489° | |
| 0° 0m 11.16s / day | |
| Inclination | 9.8105° |
| 334.84° | |
| 178.63° | |
| Physical characteristics | |
| Dimensions | 265 km (calculated) 306 km |
| 6.65 h | |
| 0.10 (assumed) | |
| B–V = 0.920±0.060 V–R = 0.710±0.050 V–I = 1.360±0.060 | |
| 5.797±0.110 (R) · 6.0 | |
(79983) 1999 DF9 (provisional designation 1999 DF9) is a trans-Neptunian object of the Kuiper belt, classified as a non-resonant cubewano, that measures approximately 270 kilometers in diameter.