NASA says Earth's new tagalong 'moon' will stay until 2083

The source provides an overview of the discovery and characteristics of 2025 PN7, an asteroid designated as Earth's new quasi-moon or quasi-satellite. Discovered by astronomers using the Pan-STARRS1 telescope, this object is not a true moon like Luna but rather shares a resonant orbital path with Earth, circling the Sun in near-perfect synchrony. The episode clarifies that the object is small, estimated to be between 18 and 36 meters wide, and has been shadowing Earth since the 1960s, remaining unnoticed until its August 2025 detection. Unlike a satellite, its motion is governed primarily by the Sun's gravity, maintaining a stable co-orbital path—predicted to last until approximately 2083—at a significant distance from our planet. The explanation notes that this phenomenon is a fascinating example of orbital coincidence in our solar system.