"It's a tragic hero, a doomed death spiral which collects information and deletes it immediately, trying to stay aloft as it empties its memory," he said. Priest will be picking up this "death-defying orbit" as his satellite transmits information back to listening stations on Earth.
The satellite will orbit Earth for three weeks before re-entering the atmosphere and disintegrating.
The event at the observatory will start at 8pm and is open to the public for a gold coin donation, which will go to the Wanganui Astronomical Society. Priest said the "cloud" of 200 pico-satellites would be released as free-flying spacecraft that would go into low orbit, the same as the space station, 300km above the Earth.
The Weight of Information is the first in Priest's art series occurring while the satellite is in orbit.
"It has been quite an adventure," Mr Priest said of the project. "I had to learn how to program satellites."