✦ Stellar Astronomy ✦
Egyptian Decan Calculator
Discover your decan placement and Chaldean planetary ruler calculated from your exact solar longitude.
36-Decan Ecliptic Division
Each decan spans exactly 10 degrees of the 360-degree tropical zodiac, combining ancient Nile stellar timekeeping with Graeco-Egyptian Hellenistic astronomy.
Understanding Egyptian Decans
Decans are 36 ten-degree segments of the ecliptic. Originally observed in ancient Egypt as star groups (*baktiu*) marking the 12 hours of the night, decans were later integrated into Hellenistic horoscopic astrology during the Ptolemaic era in Alexandria.