(768325) 2015 BP519
| Discovery | |
|---|---|
| Discovered by | Dark Energy Survey |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 17 January 2015 (first observed only) |
| Designations | |
| 2015 BP519 | |
| Caju (nickname) | |
| TNO · ESDO · ETNO distant | |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 5 | |
| Observation arc | 3.22 yr (1,176 d) |
| Aphelion | 820 AU |
| Perihelion | 35.2 AU |
| 428.03 AU | |
| Eccentricity | 0.9178 |
| 8856 yr (3,234,488 d) | |
| 358.39° | |
| 0° 0m 0.36s / day | |
| Inclination | 54.125° |
| 135.11° | |
| ≈ 7 September 2058 ±1 month | |
| 348.37° | |
| Physical characteristics | |
| 524 km (est.) 584 km (est.) | |
| 0.08 (assumed) 0.09 (assumed) | |
| 21.5 | |
| 4.4 | |
(768325) 2015 BP519, nicknamed Caju, is an extreme trans-Neptunian object from the scattered disc on a highly eccentric and inclined orbit in the outermost region of the Solar System. It was first observed on 17 January 2015, by astronomers with the Dark Energy Survey at Cerro Tololo Observatory (W84) in Chile. It has been described as an extended scattered disc object (ESDO), and fits into the group of extreme objects that led to the prediction of Planet Nine, and has the highest orbital inclination of any of these objects.