The eruption ended on day 64, which is the fastest observed decline to quiescence of a recurring nova.

[9] This eruption of U Sco became the best-observed nova event to its day, with 22,000 magnitudes accumulated.

[9] Astronomers then predicted that another eruption of U Sco would occur in 2020±2.

[citation needed] Originally identified as a nova in 1863 by English astronomer N.R.

Pogson, U Scorpii was the third nova to be identified as recurrent, by American astronomer and historian of science Helen L. Thomas, in the years preceding World War II.