地球 ちきゅう近傍 きんぼう天体 てんたいだったら
chikyūkimbōtentaidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 地球近傍天体

1. If it were a near-Earth object.; If it is a near-Earth object.

Tara Conditional
Astronomy