[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [Jyotihshastra: Astral and Mathematical Literature](https://indike.org/pramana/ins.science.pingree-1981) › c4.s5.5 # Jyotihshastra: Astral and Mathematical Literature c4.s5.5 Jyotiḥśāstra: Astral and Mathematical Literature c4.s5.5 - **Language:** English ### [c4.s5.5](https://indike.org/pramana/ins.science.pingree-1981.c4.s5.5) Following the Parahita system, and thereby the Āryapakṣa, are the vākyas. These are based on the synodic periods of the five planets and cycles based on those periods, and, in the case of the Moon, on cycles of its anomalistic period; within each synodic period true longitudes at regular time intervals are given, and in the smallest lunar cycle daily longitudes of the Moon are given. - [Previous: c4.s5.4](https://indike.org/pramana/ins.science.pingree-1981.c4.s5.4) - [Next: c4.s5.6](https://indike.org/pramana/ins.science.pingree-1981.c4.s5.6) - [Up: c4.s5](https://indike.org/pramana/ins.science.pingree-1981.c4.s5) --- Source: [https://indike.org/pramana/ins.science.pingree-1981.c4.s5.5](https://indike.org/pramana/ins.science.pingree-1981.c4.s5.5) · Pramāṇa