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2025 PN7: Earth's Tiny, Unstable Quasi-Moon Discovered

9/23/2025

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Summary

Story summary

2025 PN7 is a temporary Earth companion—a quasi-satellite not bound to Earth.
It is the smallest and least stable of Earth's seven quasi-moons.
Discovered by Hawaii’s Pan-STARRS observatory and reported in Research Notes of the American Astronomical Society (AAS).
It has persisted as a quasi-moon for about 70 years but was only recently noted for its small size and faintness.

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Story summary

2025 PN7 is a temporary Earth companion—a quasi-satellite not bound to Earth.
It is the smallest and least stable of Earth's seven quasi-moons.
Discovered by Hawaii’s Pan-STARRS observatory and reported in Research Notes of the American Astronomical Society (AAS).
It has persisted as a quasi-moon for about 70 years but was only recently noted for its small size and faintness.