Astraea is physically unremarkable but notable mainly because for NUMBER@1 years -LRB- after the discovery of ORGANIZATION@1 in NUMBER@2 -RRB- it had been thought that there were only four asteroids .

LOCATION@1 is physically unremarkable but notable mainly because for NUMBER@1 years -LRB- after the discovery of ORGANIZATION@1 in NUMBER@2 -RRB- it had been thought that there were only four asteroids .
