Discovery date 2004 Aphelion 35.961 AU (5.3797 Tm) Eccentricity 0.18777 Discovered 2004 Argument of perihelion 295.54° Absolute magnitude 8.9 | Observation arc 708 days (1.94 yr) Semi-major axis 30.276 AU (4.5292 Tm) Orbital period 166.60 yr (60849.0 d) Inclination 13.574° Mean anomaly 66.828° | |
Similar (316179) 2010 EN65, S/2004 N 1, Sao, Psamathe, Laomedeia | ||
2004 KV18 is the eighth Neptune trojan identified and the second in Neptune's L5 Lagrangian point (trailing Neptune). It is suspected to be around 56 km in mean diameter. As of 2016, it is 38 AU from Neptune. By 2097, it will be 55 AU from Neptune.
2004 KV18 is not a primordial Neptune trojan, and will leave the region on a relatively short time scale. The orbit of a Neptune trojan can only be stable when the eccentricity is less than 0.12. Its lifetime as a trailing Neptune trojan is on the order of 100000 years into the future.
References
2004 KV18 Wikipedia(Text) CC BY-SA