| Discovery | |
|---|---|
| Discovered by | S. S. Sheppard D. J. Tholen C. Trujillo |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 5 March 2019 |
| Designations | |
| MPC designation | 2019 EU5 |
| Minor planet category | TNO · ESDO (detached) · ETNO · distant |
| Orbital characteristics (barycentric) | |
| Epoch 21 January 2022 (JD 2459600.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 5.03 yr (1,837 days) |
| Earliest precovery date | 6 January 2016 |
| Aphelion | 2,395 AU |
| Perihelion | 46.759 AU |
| Semi-major axis | 1,221 AU |
| Eccentricity | 0.9617 |
| Orbital period (sidereal) | 42,630 yr |
| Mean anomaly | 359.331° |
| Mean motion | 0° 0 0.083 / day |
| Inclination | 18.207° |
| Longitude of ascending node | 109.227° |
| Argument of perihelion | 109.204° |
| Physical characteristics | |
| Mean diameter | 160–220 km (est. 0.1–0.2) |
| Apparent magnitude | 25.6 |
| Absolute magnitude (H) | 6.35±0.14 |
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. 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. It has been identified in precovery images from 6 January 2016.
References
- ^ "MPEC 2021-Y19 : 2019 EU15". Minor Planet Electronic Circular. Minor Planet Center. Retrieved 17 December 2021.
- ^ "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.
- ^ "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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