Earth has a New Companion: A Quasi-Moon Discovered Orbiting Our Planet
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A newly discovered celestial object is temporarily orbiting Earth, acting as what scientists call a “quasi-moon.” This space rock, designated 2023 FW13, is tough to observe without a large telescope and poses no threat to our planet, according to recent reports. https://www.space.com/earth-quasi-moon-2023-fw13
What is a Quasi-Moon?
Unlike true moons, quasi-moons aren’t gravitationally bound to a planet. Instead, they follow an orbit that keeps them in the vicinity of the planet for a period of time, appearing to circle it. This complex orbital dance is influenced by the gravitational forces of the Sun and the planet.
“Quasi-moons are also too small to have a measurable effect on Earth’s tides or anything else,” explained northeastern University assistant professor Jacqueline McCleary. https://www.nbcnews.com/science/space/earth-quasi-moon-2023-fw13-rcna86498
Discovery and Characteristics of 2023 FW13
2023 FW13 was discovered by Bryce Bolin at the Catalina Sky Survey in Arizona. It’s estimated to be roughly 10-20 meters (33-66 feet) in diameter – about the size of a small bus. The object has been orbiting Earth as at least 2023, and calculations suggest it will continue to do so for several more centuries.
While it appears to orbit Earth, its path is complex. it doesn’t have a stable, circular orbit like our Moon. Instead, it follows a convoluted path that brings it close to Earth, then swings it far away. This is why it’s classified as a quasi-moon rather than a true satellite.
How Common are Quasi-Moons?
Scientists believe quasi-moons are more common than previously thought. Computational studies have suggested that Earth regularly hosts dozens of these temporary companions, but most are too small and faint to be detected. https://www.livescience.com/earth-quasi-moon-2023-fw13-explained
The discovery of 2023 FW13 highlights the increasing ability of astronomers to detect these smaller, more elusive objects in Earth’s vicinity.
Key Takeaways:
* What it is: 2023 FW13 is a quasi-moon, a space rock temporarily orbiting Earth.
* Size: Approximately 10-20 meters in diameter.
* Orbit: Complex and not gravitationally bound to Earth.
* Threat: Poses no threat to Earth.
* Discovery: Found by Bryce Bolin at the Catalina Sky Survey.
Looking Ahead
The study of quasi-moons provides valuable insights into the dynamics of the solar system and the prevalence of small objects near Earth. As telescope technology continues to improve, we can expect to discover more of these fascinating celestial companions, furthering our understanding of our planetary neighborhood.