astro.wikisort.org - Asteroid

(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]

(316179) 2010 EN₆₅

2010 EN65 is jumping from L4 to L5 via L3.
Discovery[1][2]
Discovered by	D. L. Rabinowitz S. W. Tourtellotte
Discovery site	La Silla Obs.
Discovery date	7 March 2010
Designations
MPC designation	(316179) 2010 EN65
Minor planet category	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
Semi-major axis	30.758 AU
Eccentricity	0.3124
Orbital period (sidereal)	170.58 yr (62,306 days)
Mean anomaly	48.107°
Mean motion	0° 0m 20.88s / day
Inclination	19.209°
Longitude of ascending node	234.47°
Argument of perihelion	225.77°
Physical characteristics
Mean diameter	176 km (est. at 0.08)[5][6]
Absolute magnitude (H)	7.17[3]

Discovery

(316179) 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]

Orbit

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.

Physical properties

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]

Jumping trojan

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]

Numbering and naming

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]

References

External links

• List of Centaurs and Scattered Disk Objects, Minor Planet Center
• List of Trans Neptunian Objects, Minor Planet Center
• (316179) 2010 EN65 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (316179) 2010 EN65

(316179) 2010 EN65 ist ein Planetoid, der am 7. März 2010 am European Southern Observatory, La Silla von David Lincoln Rabinowitz und Suzanne Tourtellotte entdeckt wurde und zur Gruppe der Zentauren gehört. Der Asteroid läuft auf einer mäßig exzentrischen Bahn in 171 Jahren um die Sonne. Die Bahnexzentrizität seiner Bahn beträgt 0,31, wobei diese 19,22° gegen die Ekliptik geneigt ist.

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- [en] (316179) 2010 EN65

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[ru] (316179) 2010 EN65

(316179) 2010 EN65 — транснептуновый объект, обращающийся вокруг Солнца. При большой полуоси орбиты 30,8 а. е., астероид является прыгающим троянцем Нептуна, коорбитальным с Нептуном, при большой полуоси планеты 30,1 а. е. Астероид переходит из точки Лагранжа L4 в точку L5 через L3.[2] По состоянию на 2016 год астероид находился на расстоянии 54 а. е. от Нептуна.[4]

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