the observed colors. Several Neptunian Trojans have been observed to have very-red colors similar to cold classical Kuiper belt objects. Naming In 2015, the IAU adopted a new naming scheme for Neptune trojans, which are to be named after Amazons, with no differentiation between objects in L4 and L5. The Amazons were an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greeks. As of 2019, the named Neptune trojans are 385571 Otrera (after Otrera, the first Amazonian queen in Greek mythology) and 385695 Clete (after Clete, an Amazon and the attendant to the Amazons' queen Penthesilea, who led the Amazons in the Trojan war). Members The amount of high-inclination objects in such a small sample, in which relatively fewer high-inclination Neptune trojans are known due to observational biases, implies that high-inclination trojans may significantly outnumber low-inclination trojans. The ratio of high- to low-inclination Neptune trojans is estimated to be about 4:1. Assuming albedos of 0.05, there are an expected Neptune trojans with radii above 40 km in Neptune's . This would indicate that large Neptune trojans are 5 to 20 times more abundant than Jupiter trojans, depending on their albedos. There may be relatively fewer smaller Neptune trojans, which could be because these fragment more readily. Large trojans are estimated to be as common as large trojans. and display significant dynamical instability. This means they could have been captured after planetary migration, but may as well be a long-term member that happens not to be perfectly dynamically stable. As of April 2022, 33 Neptune trojans are known, of which 28 orbit near the Sun–Neptune Lagrangian point 60° ahead of Neptune, 4 orbit near Neptune's region 60° behind Neptune, and one orbits on the opposite side of Neptune () but frequently changes location relative to Neptune to L4 and L5. These are listed in the following table. It is constructed from the list of Neptune trojans maintained by the IAU Minor Planet Center and with diameters from Sheppard and Trujillo's paper on , unless otherwise noted. and were thought to be Neptune trojans at the time of their discovery, but further observations have disconfirmed their membership. is currently thought to be in a 3:5 resonance with Neptune. is currently following a quasi-satellite loop around Neptune. See also Nice model Nice 2 model , a temporary quasi-satellite of Neptune. Notes References External links