Experts have explained how long it will stay - and when it will be back
Earth is set to play host to a “mini-moon” this week, as a small asteroid – about the length of a double decker bus – enters the planet’s orbit. The temporary guest, called 2024 PT5, is set to arrive on September 29 and is expected to befriend the regular Moon for around two months.
“In either cases, we have to think about these not orbiting around us forever but for a short amount of time.” Prof Brown said the mini-moon will orbit Earth for 57 days before eventually swinging out of the planet’s gravitational pull. He said: “There is nothing explosive or dramatic happening to it for it to leave, it simply has too much energy to hang around us for too long.”
Prof Brown said: “This is an excellent example that orbits of such small bodies in our solar systems can be quite complex, briefly joining Earth before they then again proceed on a more standard elliptical path around the Sun to again meet Earth.”
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