पञ्चसिद्धान्तिका (आचार्य वराहमिहिर - सूर्य, रोमक, पौलिश, वासिष्ठ एवं पितामह सिद्धान्त)

CONTENTS XI Page Ch.XI. ECLIPSE DIAGRAM Introduction 236 Marking the ecliptic etc. (1-3) 236 Marking of points of contact etc. (4-5) 238 Conversion of minutes into angles (6) 240 Ch.XII. PAITĀMAHA SIDDHĀNTA Introduction 241 Days from Epoch (1-2) 241 Tithi, Nakṣatra etc. (3) 243 Vyatīpāta (4) 244 Duration of a day (5) 246 Ch.XIII. SITUATION OF THE EARTH: COSMOGONY Situation of the earth (1-4) 248 Rotation of the earth (5-8) 249 Situation of the Gods and Asuras (9-13) 250 Signs and Yojanas (14-16) 252 Position of Laṅkā and Ujjayinī (17) 253 Measures of the earth etc. (18-19) 253 Visibility of the Sun (20-29) 253 Astronomical observation (30-34) 258 Moon’s visibility (35-38) 258 The Planets and their situation (39-41) 259 Lords of the Months, Days and Year (42) 260 Ch.XIV. GRAPHICAL METHODS AND ASTRONOMICAL INSTRUMENTS Introductory 261 Ascensional differences of the zodiacal signs (1-4) 261 R sine of the Sun’s zenith distance for the given time (5-6) 264 Right ascensions of the signs (7) 266 Gnomon (8) 267 Local latitude (from the equinoctial midday shadow) (9-10a) 267 Sun’s longitude (10b-11) 268 V-Shaped yaṣṭi (12) 269 Moon’s longitude (13) 269 Cardinal directions (by means of a gnomon (14-16) 270 Page The Celestial Sphere (17-18) 270 Hemispherical Bowl and its use (19-20) 271 Hoop and its use (21-22) 272 Armillary Sphere (23-25) 273 Sun’s northward and southward journeys (26) 273 Instruments for measuring time (27-28) 274 Local longitude in terms of time (29-30) 274 The Nādī or Ghaṭī (31-32) 275 Conjunction of the Moon with a Star (33) 276 Positions of certain Junction- Stars (34-37) 277 Digits between the Moon and a Star in Conjunction and Time of Conjunction (38) 277 Heliacal Rising of Canopus (39-41) 278 Ch.XV. SECRETS OF ASTRONOMY Eclipses (1-10) 282 Situation at the Poles (11-16) 286 Weekday (17-18) 288 Day-reckoning (19-29) 289 Ch.XVI. SAURA SIDDHĀNTA : MEAN PLANETS Introductory 292 Mean positions of the Star-planets (1-19) 293 VM’s Bīja corrections (10-11) 298 Ch.XVII. SAURA-SIDDHĀNTA : TRUE PLANETS Epicycles of the planets (1-3) 300 True planets (4-9) 301 Special work for Mercury and Venus (10-11a) 307 Retrograde motion (11b) 309 Heliacal rising (12) 309 Latitudes of planets (13-14) 310 Ch.XVIII. VĀS.-PAU. SIDDH.: RISING AND SETTING OF PLANETS Venus (1-5) 312 Jupiter (6-13) 316 Saturn (14-20) 322 Mars (21-35) 339