Nestria

Nestria, initially referred to as the "Phantom Satellite," is a planetoid which was moved into orbit around the earth by the Swift's space friends.

Description
Originally from the asteroid belt, Nestria was moved into orbit around the earth by the Swift's space friends in 1954. A few weeks later, Swift Enterprises conducted an expedition to the satellite. Brungaria also did so at the same time.

The satellite is approximately 15 miles in diameter and is located about 50,000 miles from earth. The satellite is rich in minerals and metals, including lunite, a highly reflective metal discovered on the expedition. The satellite also contains many volcanic craters, indicative of past geologic activity.

During the expedition, Tom creates an atmosphere with his atmosphere-making machine, which allows for earth-based plants to grow and eventually causes rain to fall.

After the expedition Tom Swift and his father Tom Swift Sr. name the satellite in honor Mary Nestor Swift.