Muumindani no Suisei
English title: Comet in Moominland
Japanese title: ムーミン谷の彗星
Alternative titles: A Comet in Moominvalley, Muumin Movie
Type: Movie
Source: Book
Episodes: 1
Status: Finished Airing
Aired: Aug 8, 1992
Duration: 1 hr 12 min
Rating: G - All Ages
Studios: Visual 80
Producers: Telescreen
Genres: Adventure, Fantasy, Slice of Life
Demographics: Kids

Unusual things have been happening in Moominvalley. Moomin, Sniff and Mee leave for the Observatory on the Lonely Mountains to confirm the Muskrat's words: a comet is about to hit Moominvalley and destroy everything. On the way they meet Snufkin, the Hemulen and the Snorks and experience many adventures. 

(Source: ANN)