Prathama Moon between 0 degrees and 12 degrees from the Sun
Dwithyeeya Moon between 12 degrees and 24 degrees
Thritheeya Moon between 24 degrees and 36 degrees
Chathurthi Moon between 36 degrees and 48 degrees
Panchami Moon between 48 degrees and 60 degrees
Shashti Moon between 60 degrees and 72 degrees
Sapthami Moon between 72 degrees and 84 degrees
Ashtami Moon between 84 degrees and 96 degrees
Navami Moon between 96 degrees and 108 degrees
Dasami Moon between 108 degrees and 120 degrees
Ekadasi Moon betw een 120 degrees and 132 degrees
Dwadasi Moon between 132 degrees and 144 degrees
Thrayodasi Moon between 144 degrees and 156 degrees
Chathurdasi Moon between 156 degrees and 168 degrees
Pournami Moon between 168 degrees and 180 degrees

East & West Points on the Celestial Horizon
East and West Points are two intersecting points between the Ecliptic and the Celestial Horizon. If on the Celestial Horizon, you mark E as East , W as West, N as North and S as South, then NES is the Eastern Celestial Horizon, SWN is the Western Celestial Horizon, ENW is the Northern Celestial Horizon & ESW is the Southern Celestial Horizon.
Ayana Sandhis - Intersecting Points between the Ecliptic and the Celestial Equator
The Ecliptic is slanted 23 degrees 27 minutes from the Celestial Equator. The intersecting points between them are called as Ayana Sandhis. These Sandhis are not static. They have a retrograde motion of 50.3 seconds per year. When the Sun crosses the Celestial Equator from the South to the North, that intersecting Point is Meshadi, the First Point of Aries and when he crosses the C E from North to South that point is called Thuladi, the First Point of Libra. At the start of the Dark Age ( Kali Yuga ), all planets were in the First Point of Aries. The First Point of Aries was in the constellation of Beta Arietis or Aswini. During the Vedic period, the First Point of Aries was in Karthika. That is why in the Vedas, the constellations are counted from Karthika onwards. Now Tropical Meshadi is behind Sidereal First Point of Aswini by 23 degrees 52 minutes. This motion of the Ayanas is called Precession.

A picture from the ' Five Astronomical Treatises " ( Pancha Siddhantika ) by Varaha Mihira showing a diagramatical picture of the calculation of eclipse.

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