Move over planets and moons, Neptune's Trojan asteroids are here to reveal the secrets of our solar system's early evolution!👇
The astronomers peeked into the trojan asteroids using multiple telescopes based on the Earth, including the WASP wide field camera on the Palomar Observatory telescope in California, the GMOS cameras on the Gemini North and South telescopes in Hawaii and Chile, and the LRIS camera on the Keck Telescope in Hawaii.According to the team, this implies the presence of two populations of asteroids in the region. The redder ones could have formed at a much greater distance from the sun.
The redder Neptunian asteroids could have formed far away from this transition boundary, and later eventually drawn and captured into Neptune's orbit. Neptune has migrated from the inner solar system to its current location, which is approximately 4.5 billion kilometers from the Sun. “Because we have a larger sample of Neptunian Trojans with measured colors, we can now start to see major differences between asteroid groups. Our observations also show that the Neptunian Trojans are also different in color compared to asteroid groups even further from the Sun.
Neptunian Trojans , trans-Neptunian objects in 1:1 mean-motion resonance with Neptune, are generally thought to have been captured from the original trans-Neptunian protoplanetary disc into co-orbital resonance with the ice giant during its outward migration. It is possible, therefore, that the colour distribution of NTs is a constraint on the location of any colour transition zones that may have been present in the disc.
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