Ayanamsa

Ayanamsa shine kusurwar bambanci tsakanin zodiac na tropikal (wanda aka daura zuwa vernal equinox) da zodiac na sidereal (wanda aka daura zuwa taurari masu dindindin), wanda ke haifar da precession na equinoxes. A halin yanzu kusan 23–24°. Ayanamsa mafi yawan amfani a Indiya shine Lahiri ayanamsa (wanda gwamnatin Indiya ta amince da shi). Arcanavana na amfani da Lahiri ayanamsa don duk lissafin Vedic. Wannan shine dalilin da ya sa alamar Rana ta Vedic dinka yawanci tana kasancewa alama guda kafin alamar Rana ta Yamma.