In fact , it is the third dimmest of the first twenty-three asteroids discovered -LRB- only NUMBER@1 ORGANIZATION@1 and NUMBER@2 Thetis having lower mean opposition magnitudes .

In fact it is the third dimmest of the first twenty-three asteroids discovered , with only NUMBER@1 Egeria and the quite small NUMBER@2 Thetis having lower mean opposition magnitudesThe Brightest Asteroids .
