BPHS Chapter 5
Calculations of the graha longitude and lagna
Graha Sādhanam Adobe presenter with Visti Larsen
Grahādisādhanādhyāya
[0:00] Meaning of Sādhanam [4:32] Pancāṅga foundation/intro [5:17] miśramānakāla [9:13] yātakāla [11:39] Old Pancāṅga [16:03] rekhādeśa & laṅkadeśa [22:48] Modern Pancāṅga [24:32] Example of Kāśi Viśvanātha pancāṅga [26:05] Walkthrough of pancāṅga [31 : 54] chandraspasta /lagnaspasta [32:14] Iṣṭakāla [33:08] ghaṭikā and vighaṭikās [39:06] Clock time vs arc time [39:50] bhagaṇa [42:15] Relationship between celestial time and terrestrial time (most important topic of lecture) [44:28] Significance of number 21,600 as breaths in a day [46 : 14] Clock time expressed in ghaṭika and vighaṭikās + conversion to arc time. [49:50] Yāta kāla signification/use, AiṣyaKāla [55:05] Paṅktikāla – a. Subtraction – yāta b. Addition – Aiṣya [57:40] Time ration example (what % of the day has passed at Iṣṭakāla) [1:00:00] Ration examples in terms of ghaṭika and vighaṭikās [1:03:00] Grahabhukti + Cālana Phala [1:04:00] Kharasa [1:08:55] Śloka 4 intro [1:10:10] Derivation of Cālana Phala (formulas) [1:13:16] Different Pancāṅga systems comparison (using an example) [1:18:06] Mean motion of planets (madhyama ghati) [1:19:53] Spastaghati [ true motion of planets ] + 3 step calculation walkthrough [1:36:00] Accuracy of calculations [1:42:58] Lunar mansion/lunar zodiac [1:44:40] Nakṣatra Māsa/sidereal month [1:45:38] Bhayāta and Bhabhoga [1:53:38] Chandra Spaṣṭa Gati ( high level ) [2:01:12] Lagna sādhanam – Calculation of lagna and Udaya Ascendant w/ relationship to 4 sandhyas [2:06:45] Celestial sphere diagram + definition of Udaya lagna [2:08:10] Daśama lagna or celestial sphere [Asta Lagna on diagram [2:12:20] Turīya Lagna [2:15:37] Horizon & Meridian clarified w/ respect to individual [2:25:20] Ecliptic & celestial equinoxes clarified [2:36:40] Importance of Equinox [2:39:44]Declination – North/south coordinates & tropical zodiac [2:45:25] Maximum declination [2:49:15] Kranti throughout the year [2:52:30] Equinoctial Shadow – Palabhā (step1 for being an astrologer and calculating lagna) [2:58:00] How to make a sundial w/ reference to Sūrya Siddhānta [3:05:42] Right ascension and affect on local chart calculations [3:10:45] Ascensional Difference – Carakhaṇḍa [3:15:00] Oblique Ascension [3:17:40] Uttarāyaṇa & Dakṣiṇāyana clarifications [3:20:00] Rising values of signs at the equator (suggested to memorize this) and calculating for other locales [3:26:10] Astronomical reason for gaṇḍānta points and shifting sizes of signs [3:31:30] Ayanāṃśa [3:35:24] Lagna sādhanam – step by step instructions with example [3:45:20] 3 types of charts used in Jyotisha – Rāśi, Bhāva, & Bhāva Calita Cakra [4:00:15] Freedom closing class
