How many people make up the crew of the Eurodice?

The crew of Euridice consists of ten astronauts: Steergard, the captain; Gerbert, a psychonicist (Lem's neologism for a novel medical profession); Nakamura, an astrophysicist; Polassar, a gravistician; Kirsting, Rotmont, and El Salam, scientists; Arago, the priest; the first pilot Harrach; and the second pilot Tempe.