I will present a new interpretation of Trimalchio’s “learned” horoscope at Petr. Sat. 39. The aim is to point out that Trimalchio neither entirely comes out as amateur astrologer nor is his horoscope fully based on astrological treatises of his times. On the contrary, Trimalchio undertakes a widely unlearned methodological approach, recycles however astrological material and mixes this up with erudite puns at the internal recipients (the scholastici Agamemnon, Encolpius and co. who attend the dinner, yet fail to be worthy their profession).