Cruithne

3753 Cruithne
is an Aten asteroid in orbit around the Sun in 1:1 orbital resonance with Earth, making it a co-orbital object. It is a minor planet in solar orbit that, relative to Earth, orbits in a bean-shaped orbit that ultimately effectively describes a horseshoe, and which can transition into a quasi-satellite orbit. It has been incorrectly called "Earth's second moon". Cruithne does not orbit Earth and at times it is on the other side of the Sun. Its orbit takes it inside the orbit of Mercury and outside the orbit of Mars. Cruithne orbits the Sun in about 1 year but it takes 770 years for the series to complete a horseshoe-shaped movement around the Earth.

Name
The name Cruithne is from Old Irish and refers to the early Picts (Irish: Cruthin) in the Annals of Ulster and their eponymous king ("Cruidne, son of Cinge") in the Pictish Chronicle.

Discovery
Cruithne was discovered on October 10, 1986, by Duncan Waldron on a photographic plate taken with the UK Schmidt Telescope at Siding Spring Observatory, Coonabarabran, Australia. The 1983 apparition (1983 UH) is credited to Giovanni de Sanctis and Richard M. West of the European Southern Observatory in Chile.

History
It was not until 1997 that its unusual orbit was determined by Paul Wiegert and Kimmo Innanen, working at York University in Toronto, and Seppo Mikkola, working at the University of Turku in Finland.

Cruithne despite its close proximity to Earth was not visited or surveyed until  2122  . The new commandant of Earth's fleet discovers a Freon outpost with hundreds of "human experiments" either in stasis or in "jars". Thousands of mutilated cows, goats and other Terran life forms.

Siegfried Held claimed to ave fought hundreds of Freons, in an heroic battle and was aided by Falkenhorst forces in the very last moment.

Cruithne became a base for   United Earth Fleet, was orbital bombed by Stahl in 2123 and became a Mining colony in 2130

An archeological dig in 4088 revealed evidence that the original Freon base was everything Siegfried Held claimed it was, except the fact it had been abandoned by the Freons before Earth ascended.

Today Cruithne has two cities (Waldron Town and Duncan's Place ) and about 2 million inhabitants. Mining operations have been abandoned long ago and the object became a retirement community for Earth and Sol citizens. Gravitation is kept lower and several assisted living communities exist within the two  towns.