The recently identified asteroid Arjuna 2025 PN7 has captured scientists’ attention for its unusual orbit: although not a true moon, it moves almost in lockstep with Earth, earning it the tag of a “quasi-moon”.Discovered by the University of Hawaii and confirmed by NASA, this tiny celestial body belongs to the Arjuna class of asteroids - rocks whose solar orbits mirror our own. 

Measuring between 18 and 36 metres in diameter, Arjuna 2025 PN7 is modest in size but significant in terms of its surprising companionship. At its nearest, it approaches about 4 million km – roughly ten times the distance between Earth and our Moon – and can drift as far out as 17 million km. 

Remarkably, this rock has likely been shadowing Earth’s path since the 1960s, its faint presence only now visible thanks to advances in sky-scanning. Currently, it appears destined to remain in this co‐orbiting state until approximately 2083. Arjuna 2025 PN7 reminds us that Earth is not alone - not just in space, but in dynamic cosmic companionship.