池谷 いけがや せき彗星 すいせいであれば
ikegaya·sekisuiseideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 池谷・関彗星

1. If it were Ikegaya-Sekai Comet; If the Ikegaya-Sekai Comet were present

Ba Conditional