Karan is one of the five parts of the Panchang. Karan is calculated mathematically. Each Karan is calculated as half of a Tithi. Therefore there are 2 Karans in a Tithi, which means a Tithi is divided into two parts.
A Tithi is formed at a distance of twelve degrees from the Sun, and Karana is formed at a distance of six degrees from the Sun. Thus, two Karanas occur in one Tithi. Karana Jyotisha is a part of Panchang, and it is used