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

X CONTENTS Page Page Astronomer's qualifications (36-37) 112 True Sun (1-3) 181 Gnomonic shadow and the prime True Moon (4-6) 183 vertical (38) 113 Daily motion of the Sun and the Moon (7) 185 Agrā : Sine amplitude (39) 113 Rāhu (8) 186 Latitude from Agrā (40) 114 Parallax in longitude (9) 187 Shadow at desired time (41-44) 115 Declination of the Nonagesimal (10-12) 187 Time after sunrise (45-47) 118 Parallax correction and orbital Time for Sunset (48) 121 diameter (13-14) 189 Shadow from time (49) 122 True diameter of the orbs (15) 191 Moon's shadow (50-51) 123 Moment of the eclipse (16) 192 Directions from shadow (52-54) 126 Eclipse diagram (17-18) 192 Sun from shadow (55-56) 132 Ch.V. PAULIŚA-SIDDHĀNTA : Ch.IX. SAURA-SIDDHĀNTA : MOON'S CUSPS SOLAR ECLIPSE Introductory 137 Introductory 197 Time of Moon's visibility (1-3) 137 Mean Sun (1) 197 Diagram of the Moon's cusps (4-7) 143 Mean Moon (2-4) 198 Daily rising and setting of the Rāhu : Maximum latitude (5-6) 201 Moon (8-10) 147 True Sun and Moon (7-9) 203 Epicyclic theory 206 Ch.VI. (VĀSIṢṬHA-) PAULIŚA- Bhujāntara correction 209 SIDDHĀNTA : LUNAR ECLIPSE Udayāntara correction 209 Introductory 152 Deśāntara correction (10) 209 Sun and Moon of equal longitude (1) 152 Mean motion of the Sun and the Moon (11) 210 Probability of an eclipse (2) 154 Motion of Moon's anomaly (12) 211 Duration of the eclipse (3-4) 156 True motion of Sun and Moon (13-14) 211 Total obscuration (5) 160 Kakṣā of the Sun and the Moon (15) 214 Direction of the eclipse (6-8) 162 Measure of the orbs (16) 215 Moment of the eclipse and its Sin Zenith Distance of Meridian colour (8-10) 165 point (17-18) 216 Diagrammatic representation (11-13) 168 Dṛkṣepa of the Sun (19-20) 219 Lunar and Solar eclipses – Gnomon (21) 220 Differences (14) 171 Parallax-corrected New Moon (22-23) 221 Parallax in latitude (24-25) 223 Ch.VII. (PAULIŚA-SIDDHĀNTA) : Duration of the eclipse (26-27) 225 SOLAR ECLIPSE Introductory 172 Ch.X. SAURA-SIDDHĀNTA : Parallax of longitude (1) 172 LUNAR ECLIPSE Parallax in latitude (2-4) 176 Eclipse computation (5-6) 178 Introduction 228 Diameter of the Shadow (1-2a) 228 Ch.VIII. ROMAKA-SIDDHĀNTA : Duration of the Eclipse (2b-4) 230 SOLAR ECLIPSE Obscuration at any desired moment (5-6) 232 Introductory 181 Time of total obscuration (7) 235