Is 108 sidereal days as long as The First spaceflight (Sputnik)?
It's about one-and-one-fifth times as long as The First spaceflight (Sputnik)
The length of The First spaceflight (Sputnik) is about 92 sidereal days.
(a.k.a. Sputnik 1, a.k.a. Спутник-1, a.k.a. "Satellite-1", a.k.a. Простейший Спутник-1) (1957) (total time in orbit)
Launched from Kazakhstan in 1957, Sputnik was the first artificial satellite placed into orbit around Earth, where it remained for 92 sidereal days. During its voyage, it traveled about 70,000,000 km (43,495,983.46 mi), completing an orbit of the planet every 0.067 sidereal days.
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