Observing the Ascendant and MC with a planisphere.

If you have a planisphere, observing the ascendant and MC for a certain time and date is very easy. See the instruction below.

  1. Set the time and date you want.
  2. Find the intersections of the ecliptic ( the yellow line circle below ) and the horizon ( the edge of the oval window ).
    The intersection at the left-hand side is the ascendant, the right-hand side is the descendant.
  3. Set a ruler vertically on the center of the planisphere (the green line on the diagram below).
  4. Find the intersections of the ecliptic and the ruler. The intersection in the oval window is MC, the other side ( covered side ) is IC.

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Long Ascension and Short Ascension

William Lilly tells us about the signs of Long Ascension and Short Ascension on page 92, Christian Astrology I. This footage shows a simulated sky motion for 48 hours. You’ll see the differences between Long Ascension signs and Short Ascension signs.

The simulated sky motion of Yokohama, Japan (35N2) December 31, 2010 – January 2, 2020
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