Satellitti Jenkki cards were released in 1964 by Suklaatehdas Hellas Oy of Turku, Finland. The 120-card series was distributed in wax packs with Hellas Jenkki chewing gum. The card text is printed in Finnish and Swedish. Each card measures approximately 55 x 80 mm. The series is copyrighted by Editorial Ruis Romero in Barcelona, Spain.

The Satelliitti cards feature illustrated images of Vostok and Project Mercury missions. The series notably depicts various test animals that include American primates Sam and Ham; and Soviet dogs Laika, Kozyavka, Belka, and Strelka.

The checklist not a direct translation of the card text. Identifications and corrections are included.