“The Solar System is full of surprises so we keep looking,” study co-lead author Carlos de la Fuente Marcos told CNN. “For Earth’s neighborhood, the existence of 2025 PN7 suggests that there may not exist a lower limit to the size of a quasi-satellite.”The object is tiny. According to de la Fuente Marcos, it’s currently the smallest known quasi-moon that’s orbited near our planet. The first of these was detected in 1991, making 2025 PN7 the newest known family member. And before it does, we should study it up close, de la Fuente Marcos argues.