________________
14
DA
―
n
449
Now from eq. No. (1), we have
V1D1-V2D2.
Duration (time counted in number of days) of heliacal combustion of Venus in nth vithi
Serial number of vithis arranged in natural order of nakṣatras associated with them such that n=1 represents nāga vithi and so on (see table No. 4)
..V1 V ..... ·V, : 3 ̧ · B2·········3 ̧
1
=V,D,=K.........(2)
.. Mean velocity Vn of Venus in different vithis (lanes) can be graphed by plotting against their respective zodiacal intercepts (see table No. 4) as shown in fig. No. 2:
B A C
(65) (72) (109)
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BA C (245)(252) (289) 81967 Muhurtas of arc
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Names of vithis, 1: Naga (Snake), 2. Gaja (Elephant), 3. Airavala (Chief Elephahi), 4. Vrsa (Bull), 5. Aja (Goat), 6. Mrga(Deer), 7. Vaisvānara (Fire). 8. Jaradgava (Old Bull) 9.Go (Cow).
Sidereal longitudes (assuming longitude of spica as 180) in about 3rd. century B.C. Sun: Apogee A, Perigee = A'
10
Venus: Ascending node = B, Descending node = B. Perihelion = C. Aphelion = C N.B. Sidereal longitudes in about 1975 A.D. (and approximate velocities) Sun: Apogee = 79° (+12' per year)
Venus: Ascending node = 53° (-30' per 95 years)
Perihelion 108 (-0.01 per 19 years)
(368)
Fig. No. 2 Graphic representation of mean velocity Vn=(K/Dn) of Venus during heliacal inferior combustion in different vithis (lanes) among the lunar mansions under assumption of constant kālānśa (arc of visibility).
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