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There’s a small asteroid that appears to orbit Earth in a horseshoe shape. Sometimes referred to as Earth’s second moon, but it’s orbit is much weirder than that.
Host: Reid Reimers
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Sources:
https://www.nature.com/articles/42662
http://theconversation.com/earths-other-moon-and-its-crazy-orbit-could-reveal-mysteries-of-the-solar-system-38010
https://www.businessinsider.com.au/cruithne-is-not-earths-second-moon-2015-3?r=US&IR=T
https://futurism.com/a-day-on-cruithne-earths-second-moon
https://earthsky.org/space/does-earth-have-a-second-moon
http://www.astro.uwo.ca/~wiegert/3753/3753.html
https://physicsworld.com/a/earths-second-moon-target-of-proposed-mission/
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Images:
https://svs.gsfc.nasa.gov/11935
https://en.wikipedia.org/wiki/File:Horseshoe_orbit_of_Cruithne_from_the_perspective_of_Earth.gif
https://en.wikipedia.org/wiki/File:Orbits_of_Cruithne_and_Earth.gif
https://www.spacetelescope.org/videos/hubblecast52f/
https://en.wikipedia.org/wiki/File:Cruithne.jpg
https://commons.wikimedia.org/wiki/File:Animation_of_3753_Cruithne_orbit.gif
https://en.wikipedia.org/wiki/File:Animation_of_Epimetheus_orbit_-_Rotating_reference_frame.gif
https://www.eso.org/public/videos/esocast82b/
https://www.istockphoto.com/vector/cute-cartoon-earth-with-moon-gm517518868-89525783
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