385571 Otrera

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2004 UP10
Discovered by Scott S. Sheppard and Chad Trujillo
Discovery date 16 October 2004[1]
MPC designation (385571) Otrera
Neptune trojan
Orbital characteristics[1][2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 4
Observation arc 3277 days (8.97 yr)
Aphelion 30.807 AU (4.6087 Tm)
Perihelion 29.320 AU (4.3862 Tm)
30.063 AU (4.4974 Tm)
Eccentricity 0.024741
164.84 yr (60208.44 d)
Inclination 1.4349°
Earth MOID 28.327 AU (4.2377 Tm)
Jupiter MOID 24.3278 AU (3.63939 Tm)
Physical characteristics

385571 Otrera (provisional designation: (385571) 2004 UP10) is a Neptune trojan discovered by Scott S. Sheppard and Chadwick A. Trujillo in 2004. It was the second such body to be discovered. It has the same orbital period as Neptune and orbits at the L4 Lagrangian point about 60 degrees ahead of Neptune.

Otrera is the first Neptune Trojan to be named. It is named after the first queen of the Amazons. Otrera was involved with Ares and is the mother of the Amazons queen Penthesilea, who led the Amazons in the Trojan war.

The Neptune Trojan naming scheme is to name these objects after things related to the Amazons, which is an all female warrior tribe that fought in the Trojan war on the side of the Trojans.


  1. ^ a b "JPL Small-Body Database Browser: 385571 (2004 UP10)" (2006-11-13 last obs). Retrieved 25 March 2016. 
  2. ^ AstDys Retrieved 2011-09-01

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