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(316179) 2010 EN65

Jumping Neptune trojan

Field	Value
minorplanet	yes
background	#C2E0FF
name
image	Lagrange points2.svg
caption	is jumping from to via .
discovery_ref
discoverer	D. L. Rabinowitz
S. W. Tourtellotte
discovery_site	La Silla Obs.
discovered	7 March 2010
mpc_name
mp_category	TNONeptune trojan
distant
orbit_ref
epoch	23 March 2018 (JD 2458200.5)
uncertainty	2
observation_arc	25.45 yr (9,296 days)
aphelion	40.367 AU
perihelion	21.148 AU
semimajor	30.758 AU
eccentricity	0.3124
period	170.58 yr (62,306 days)
mean_anomaly	48.107°
mean_motion	/ day
inclination	19.209°
asc_node	234.47°
arg_peri	225.77°
mean_diameter	(est. at 0.08)
abs_magnitude	7.17

S. W. Tourtellotte distant

**** 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 into via . , it is 54 AU from Neptune. By 2070, it will be 69 AU from Neptune.

Discovery

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.

Orbit

follows a rather eccentric orbit (0.31) with a semi-major axis of 30.72 AU and an inclination of 19.3º. Its orbit is well determined with images dating back to 1989.

Physical properties

is a quite large minor body with an absolute magnitude of 7.17 and an estimated diameter of 176 km based on an assumed albedo of 0.08.

Jumping trojan

is another co-orbital of Neptune, the second brightest after the quasi-satellite . is currently transitioning from librating around Lagrangian point L4 to librating around L5. This unusual trojan-like behavior is termed "jumping trojan".

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 7 February 2012 (M.P.C. 78220). , it has not been named. 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.

References

|access-date= 7 September 2016}} (rotating frame)

References

(10 April 2018). "DIVISION F / Working Group for Small Body Nomenclature Working Group for Small Body Nomenclature. THE TRIENNIAL REPORT (2015 Sept 1 - 2018 Feb 15)". IAU.
[http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2010EN65 2010 EN65 at JPL Horizons] Change "Observer Location" to @Neptune

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

neptune-trojans discoveries-by-david-l.-rabinowitz discoveries-by-suzanne-w.-tourtellotte astronomical-objects-discovered-in-2010

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