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Earth's fake Moon? This 'quasi-moon' has circled Earth since at least 100 BC, and will continue to do so

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Earth's fake Moon? This 'quasi-moon' has circled Earth since at least 100 BC, and will continue to do so

  • Astronomers have recently discovered a ‘quasi-moon’ called ‘2023 FW13’ that orbits the Earth but is actually gravitationally bound by the Sun.

2023 FW13

  • It is an asteroid which has been designated as a quasi-satellite or a quasi-moon.
  • It is among the few known quasi-moons or satellites that we know of in our solar system.
  • It was identified by experts utilizing the Pan-STARRS telescope situated atop Hawaii’s Haleakala volcano.
  • It has been in Earth's vicinity since 100 BC and will keep circling our planet for at least another 1,500 years, until AD 3700.

Features

  • The newfound asteroid 2023 FW13 circles the sun in sync with Earth.
  • According to preliminary estimates, its diameter is from 10 to 20 meters.
  • While not gravitationally bound to Earth in any discernible way (like our Moon), the asteroid's bizarre orbit makes it circle our planet occasionally, earning it the name of a quasi-satellite or quasi-moon.
  • At the closest point in its slightly elliptical orbit around Earth, the moon comes within about 223,693 miles (360,000 km) of our planet.

What are quasi-moons?

  • Quasi-moons are also known as 'quasi-satellites' because they appear to orbit our planet in the same way that our natural satellite, the Moon.
  • It is a space rock that circles the Earth, but is gravitationally bound by the sun.

Prelims Take Away

  • 2023 FW13
  • asteroid
  • Pan-STARRS telescope
  • Quasi-moons

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