SHAFAQNA – The Grand Ayatollah Sistani answered a question about lunar eclipse.
Question: A kind of lunar eclipse where the whole circle of the moon is not covered fully by the shadow, but a pale shadow covers half of the moon; is Salaatul Ayaat Wajib?
The Grand Ayatollah Sistani: If it is a described, Salaatul Ayaat is not Wajib. And Salaatul Ayaat is Wajib when the light of a part (of the moon) or the whole circle of the moon is hidden.
Source: PERSIAN SHAFAQNA