Thirumana Porutham is based on 27 birth stars (Nakshatras). Every person is born under one of these stars, and marriage compatibility is checked by comparing the girl’s star with the boy’s star.
The 27 stars used in Thirumana Porutham are:
- Ashwini
- Bharani
- Karthigai
- Rohini
- Mrigashira
- Thiruvathirai
- Punarpoosam
- Poosam
- Ayilyam
- Magham
- Pooram
- Uthiram
- Hastham
- Chithirai
- Swathi
- Visakam
- Anusham
- Kettai
- Moolam
- Pooradam
- Uthiradam
- Thiruvonam
- Avittam
- Sathayam
- Poorattathi
- Uthirattathi
- Revathi
