385571 Otrera

2004 UP₁₀

Discovery
Discovered by	Scott S. Sheppard and Chad Trujillo
Discovery date	16 October 2004[1]
Designations
Alternative names	MPO157352
Minor planet category	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)
Semi-major axis	30.063 AU (4.4974 Tm)
Eccentricity	0.024741
Orbital period	164.84 yr (60208.44 d)
Mean anomaly	348.60°
Mean motion	0.0059792°/day
Inclination	1.4349°
Longitude of ascending node	34.758°
Argument of perihelion	7.0511°
Earth MOID	28.327 AU (4.2377 Tm)
Jupiter MOID	24.3278 AU (3.63939 Tm)
Physical characteristics
Absolute magnitude (H)	8.8

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.

References

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

External links

• 385571 Otrera at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters