| Discovery [1] | |
|---|---|
| Discovered by |
S. S. Sheppard D. J. Tholen C. Trujillo |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 5 March 2019 |
| Designations | |
| 2019 EU5 | |
| TNO [2] · ESDO ( detached) [3] · ETNO · distant [4] | |
| Orbital characteristics (barycentric) [5] | |
| Epoch 21 January 2022 ( JD 2459600.5) | |
| Uncertainty parameter 4 [2] | |
| Observation arc | 5.03 yr (1,837 days) |
| Earliest precovery date | 6 January 2016 |
| Aphelion | 2,395 AU |
| Perihelion | 46.759 AU |
| 1,221 AU | |
| Eccentricity | 0.9617 |
| 42,630 yr | |
| 359.331 ° | |
| 0° 0m 0.083s / day | |
| Inclination | 18.207° |
| 109.227° | |
| 109.204° | |
| Physical characteristics | |
Mean diameter | 160–220 km ( est. 0.1–0.2) [6] |
| 25.6 [1] | |
| 6.35±0.14 [2] [4] | |
2019 EU5 is an extreme trans-Neptunian object from the scattered disc on a highly eccentric orbit in the outermost region of the Solar System. It was discovered on 5 March 2019, by American astronomers Scott Sheppard, David Tholen, and Chad Trujillo at Mauna Kea Observatories in Hawaii, and announced on 17 December 2021. [1] It was 83.4 astronomical units from the Sun when it was discovered, making it one of the most distant known Solar System objects from the Sun as of December 2021 [update]. [1] It has been identified in precovery images from 6 January 2016. [2]
References
- ^ a b c d "MPEC 2021-Y19 : 2019 EU15". Minor Planet Electronic Circular. Minor Planet Center. Retrieved 17 December 2021.
- ^ a b c d "JPL Small-Body Database Browser: (2019 EU15)" (2021-01-16 last obs.). Jet Propulsion Laboratory. Retrieved 17 December 2021.
- ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. International Astronomical Union. Retrieved 17 December 2021.
- ^ a b "2019 EU15". Minor Planet Center. International Astronomical Union. Retrieved 17 December 2021.
- ^ "Horizons System". Jet Propulsion Laboratory. Retrieved 17 December 2021. (Solution using the Solar System barycenter. Ephemeris Type: Osculating Orbital Elements, Coordinate Center: 500@0, Time Specification: JD 2459600.5)
- ^ "Asteroid Size Estimator". Center for Near Earth Object Studies. Jet Propulsion Laboratory. Retrieved 17 December 2021.
External links
- 2019 EU5 at AstDyS-2, Asteroids—Dynamic Site
- 2019 EU5 at the JPL Small-Body Database
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