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|Number of cells||16|
|Discovered by|| Arthur Taber|
|Year of discovery||1971|
Octagon 2 was the first known period-5 oscillator, discovered in 1971 independently by Sol Goodman and Arthur Taber; the name is due to the latter. Its discovery was first reported in Lifeline Volume 1.
Octagon 2 is about the twenty-sixth most common naturally-occurring oscillator in Achim Flammenkamp's census, being about as common as unix. On Catagolue, it is the most common period 5 oscillator, being more common than fumarole.
- 16P5.1 at Heinrich Koenig's Game of Life Object Catalogs