Equator

Khasvasthikaad dakshinatho akshabhaagow paathaa (la)

samjnachha thathottharena naadyankitham vaishuvatham

thaduktham vruttham bhagolasya khagolamadhye

  The sphere of the asterisms lie within the sphere of the sky. Great circle of the sphere of asterisms which lies towoards the south of the zenith by an amount equal to the degrees of local latitude and towards the north of nadir by the same amount and which is graduated with the division of nadis is the vishuvathvrutta. This circle is called the equator.]]>