Dear Varun N Rao,

Thank you very much for pointing it out. It appears that perhaps you are the only one who has read this. Because the error is obvious. It must have missed my attention while wrting this article. The computation is obvious, when a Graha is near its debility, the longevity granted is zero, and full in exaltation. For this, the formula should be Longevity granted by that Graha = Full Pindayu * Effective Arc / 180º. Notice that I have divided the effective arc by 180 instead of 360, because what I need to know is whether the Graha is closer to 180 or to 0 from the highest exaltation point. To reduce the effective arc, we should adopt the following. I have proposed some amendment to the previously proposed formula as this is simpler. Now instead of taking the highest exaltation point, I am using the deepest debility point.

1. Step1: Find the distance of the Graha from the exaltation point. Lets take your example, Surya in 8º. Arc of Longevity = Zodiac Degrees — Highest exaltation point = 8º-10º=-2. Since, the figure is less than 360, we must add 360 to it, which makes it 358º
2. Step2: We must find the effective arc now, which should be between 0 (near debility) and 180 (near exaltation). Since the previous step, the arc is between 0 to 360, we must reduce them to 0 to 180. This can be done in this manner. Effective longevity arc = [180 — Arc of longevity]. This is absolute value, which means we disregard the signs, “+” or “-” in the result. In our example, it is [180 — 358] = 178
3. Step 3: Longevity = Full longevity * Effective Arc / 180 = 19 * 178 / 180 = 18.79.

If say, Sun was in 30 degree, then longevity arc = 30–10 = 20. Effective arc = [180 -20] = 160. Longevity = 19 * 160/180 = 16.89.

If say, Sun was in 110 degree, then longevity arc = 110–10=100. Effective arc = [180 -100] = 80. Longevity = 19 * 80/180 = 8.44.

If say, Sun was in 210 degree, then longevity arc = 210–10=200. Effective arc = [180 -200]= 20. Longevity = 19 * 20/180 = 2.11.

Hope this makes sense now. Thanks again for highlighting this.

Cheers and regards,

Varahamihira