Discovery [1] [2] | |
---|---|
Discovered by |
D. L. Rabinowitz S. W. Tourtellotte |
Discovery site | La Silla Obs. |
Discovery date | 7 March 2010 |
Designations | |
(316179) 2010 EN65 | |
TNO
[3] ·
Neptune trojan
[4] distant [2] | |
Orbital characteristics [3] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 2 | |
Observation arc | 25.45 yr (9,296 days) |
Aphelion | 40.367 AU |
Perihelion | 21.148 AU |
30.758 AU | |
Eccentricity | 0.3124 |
170.58 yr (62,306 days) | |
48.107 ° | |
0° 0m 20.88s / day | |
Inclination | 19.209° |
234.47° | |
225.77° | |
Physical characteristics | |
Mean diameter | 176 km (est. at 0.08) [5] [6] |
7.17 [3] | |
(316179) 2010 EN65 is a trans-Neptunian object orbiting the Sun. However, with a semi-major axis of 30.8 AU, the object is actually a jumping Neptune trojan, co-orbital with Neptune, as the giant planet has a similar semi-major axis of 30.1 AU. The body is jumping from the Lagrangian point L4 into L5 via L3. [4] As of 2016 [update], it is 54 AU from Neptune. By 2070, it will be 69 AU from Neptune. [7]
2010 EN65 was discovered on 7 March 2010, by David L. Rabinowitz and Suzanne W. Tourtellotte using the 1.3-meter Small and Medium Research Telescope System (SMARTS) at Cerro Tololo Observatory in Chile. [1]
2010 EN65 follows a rather eccentric orbit (0.31) with a semi-major axis of 30.72 AU and an inclination of 19.3º. [3] Its orbit is well determined with images dating back to 1989.
2010 EN65 is a quite large minor body with an absolute magnitude of 7.17 and an estimated diameter of 176 kilometers (109 miles) based on an assumed albedo of 0.08. [5] [6]
2010 EN65 is another co-orbital of Neptune, the second brightest after the quasi-satellite (309239) 2007 RW10. 2010 EN65 is currently transitioning from librating around Lagrangian point L4 to librating around L5. [4] This unusual trojan-like behavior is termed "jumping trojan". [8]
This minor planet was numbered by the Minor Planet Center on 7 February 2012 ( M.P.C. 78220). [9] As of 2021 [update], it has not been named. [2] If named, it will follow the naming scheme already established with 385571 Otrera and 385695 Clete, which is to name these objects after figures related to the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek. [10]
Discovery [1] [2] | |
---|---|
Discovered by |
D. L. Rabinowitz S. W. Tourtellotte |
Discovery site | La Silla Obs. |
Discovery date | 7 March 2010 |
Designations | |
(316179) 2010 EN65 | |
TNO
[3] ·
Neptune trojan
[4] distant [2] | |
Orbital characteristics [3] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 2 | |
Observation arc | 25.45 yr (9,296 days) |
Aphelion | 40.367 AU |
Perihelion | 21.148 AU |
30.758 AU | |
Eccentricity | 0.3124 |
170.58 yr (62,306 days) | |
48.107 ° | |
0° 0m 20.88s / day | |
Inclination | 19.209° |
234.47° | |
225.77° | |
Physical characteristics | |
Mean diameter | 176 km (est. at 0.08) [5] [6] |
7.17 [3] | |
(316179) 2010 EN65 is a trans-Neptunian object orbiting the Sun. However, with a semi-major axis of 30.8 AU, the object is actually a jumping Neptune trojan, co-orbital with Neptune, as the giant planet has a similar semi-major axis of 30.1 AU. The body is jumping from the Lagrangian point L4 into L5 via L3. [4] As of 2016 [update], it is 54 AU from Neptune. By 2070, it will be 69 AU from Neptune. [7]
2010 EN65 was discovered on 7 March 2010, by David L. Rabinowitz and Suzanne W. Tourtellotte using the 1.3-meter Small and Medium Research Telescope System (SMARTS) at Cerro Tololo Observatory in Chile. [1]
2010 EN65 follows a rather eccentric orbit (0.31) with a semi-major axis of 30.72 AU and an inclination of 19.3º. [3] Its orbit is well determined with images dating back to 1989.
2010 EN65 is a quite large minor body with an absolute magnitude of 7.17 and an estimated diameter of 176 kilometers (109 miles) based on an assumed albedo of 0.08. [5] [6]
2010 EN65 is another co-orbital of Neptune, the second brightest after the quasi-satellite (309239) 2007 RW10. 2010 EN65 is currently transitioning from librating around Lagrangian point L4 to librating around L5. [4] This unusual trojan-like behavior is termed "jumping trojan". [8]
This minor planet was numbered by the Minor Planet Center on 7 February 2012 ( M.P.C. 78220). [9] As of 2021 [update], it has not been named. [2] If named, it will follow the naming scheme already established with 385571 Otrera and 385695 Clete, which is to name these objects after figures related to the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek. [10]