Your local bureau of meteorology provides a daily weather forecast that covers a 24 hour time period. It lets you know the type of weather conditions you can expect during that time. But in global astrology the event forecast period for a specified astrological event in a cycle chart or the sky isn’t as regular.
Progressed aspects in cycle charts have a 1° orb of effective influence.
The chart’s ruling planet is moving and the birthchart planet is stationary and the event a specified aspect forecasts can only occur when the two planets are within this 1°orb.
The aspect’s forecast period is determined by the moving planets rate of motion. If it’s a fast moving planet (Sun, Mars or Jupiter) the forecast period is short and if it’s a slow moving planet (Saturn, Uranus, Neptune or Pluto) it’s long.
When the moving planet moves to within 1° of an aspect with a birthchart planet the aspect starts. This start date signifies the start of the aspect’s forecast period.
The aspect reaches its peak date when the moving planet reaches the same degree and minute as the birthchart planet. This peak date signifies when the astrological event is at its peak power.
The aspect ends when the moving planet moves beyond 1°of the birthchart planet. This end date signifies the end of the aspect’s forecast period.
An aspect at its start date has a specified amount of astrodyne power which gradually builds. It reaches maximum power on its peak date and then its power gradually decreases. At its end date, which signifies the end of the forecast period, the aspect has no astrodyne power.
So the forecast time-frame for any cycle chart aspect is a specified period having a start and end date with the event likely to occur near its peak date. The energy being liberated by the aspect rises and falls in a wave like motion that looks like this.
The start and end dates provide astrological events with a forecast period and the peak date indicates when the energy being liberated is at its peak power.
The time-frame of an aspect in the Mars cycle is 3 days. Parallel aspects are longer. And the time frame of an aspect in the Jupiter cycle is around two weeks. Parallel aspects are longer.
Due to their slower rate of motion the aspects formed by Saturn, Uranus, Neptune and Pluto in their cycles are much longer – even years. Whatever… the event signified by an aspect in any cycle chart can occur at any time during its designated forecast period.
Conjunction, opposition and square aspects formed by planets in the sky have a wide – 10° – orb of influence. The aspect starts and ends when the two planets move to within and beyond this 10°orb. And it reaches maximum peak power when the two planets are in the same degree and minute of the zodiac and the aspect is perfect.