Progressed Chart: Secondary Progressions

The rule behind secondary progressions is simple: each day after your birth stands for a year of your life. The sky one day after you were born describes your first year, the sky forty days after your fortieth.

On the wheel above, your natal planets stay on the inner ring and the progressed ones sit on the outer ring.

The progressed Moon is the one to watch. It moves into a new sign about every two and a half years and goes all the way around in roughly 27 to 28 years. Its current sign describes the emotional chapter you are in: what feeds you, what you crave, the mood of these few years.

The progressed Sun creeps forward about a degree a year and changes sign only two or three times in a lifetime. When it does, people often describe it afterward as the start of a new era.

The calculator takes your age in whole years, counts that many days forward from your birth, and casts the chart for that date. At 34, your progressed chart is the sky 34 days after you were born.

An accurate birth time matters for the progressed Moon and Ascendant. Without one, the progressed Sun and slower planets are still worth reading.

Progressions describe change from the inside, the slow ripening of your own chart. Transits come from outside, from the planets in today’s sky touching your natal placements.

The progressed Moon tells you which chapter you are in; transits show the weeks when that chapter comes to a head.

Secondary progression is the most widely used method, and its rule is deliberately simple: one day after birth stands for one year of life. The chart for your thirtieth birthday is cast for the thirtieth day after you were born. There is no physical mechanism claimed for this and astrologers do not usually pretend otherwise. It is a symbolic correspondence that has been in use since at least the seventeenth century because practitioners found it descriptive.

There are other progression methods, and knowing they exist explains why two readings can differ. Solar arc directions move every point in the chart forward by the same amount the Sun progressed, which keeps the whole chart in one piece and produces different timing from secondary progressions. Tertiary progressions use a day for a lunar month. Primary directions, the oldest method, use the rotation of the Earth and are far more sensitive to birth time than any of the others.

Sigastra computes secondary progressions because they are the method the modern literature is written in, so what you read here lines up with what you will find elsewhere. If a source gives you a date that does not match, the first thing to check is which method it used rather than assuming one of the two is wrong.

The most common mistake is treating a progressed placement as an event. Progressions describe inner development and they are slow; a progressed Sun sign describes a phase of life, not a month.

A second point that surprises people: progressions keep running when nothing visible is happening. Between two sign changes of the progressed Moon there are about two and a half quiet years, and that quiet is itself the statement. Waiting for an upheaval during such a stretch is waiting for something the progression is not announcing.

Where progressions are worth the most is in hindsight. Progressed Moon sign changes and progressed Sun sign changes frequently coincide with periods people later describe as the boundary between chapters. Checking your own past against those dates is a fair test of whether the method describes anything for you, and it costs nothing but the time to look.

One last tip. When a year feels significant but your transit list looks unremarkable, look at the progressed chart. A progression can describe a change in you while the sky overhead stays quiet.