地球 ちきゅう近傍 きんぼう しょう惑星 わくせいだったら
chikyūkimbōshō waku seidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 地球近傍小惑星

1. If/when it were a near-Earth asteroid.; If/when it's a near-Earth asteroid.

Tara Conditional
Astronomy