What these rules do — and what they don't
This is the most frequently skipped part of classical horary: you do not move to judgment the moment the chart is cast. First you put a question to the chart itself — does this chart actually represent the question asked? The rules Lilly called considerations before judgment are that test.
The common mistake is to treat them as part of the answer. They are not. An Ascendant at 2 degrees does not mean “no”; it means “do not draw either a yes or a no from this chart.” The difference is as large as the one between a court dismissing a case and acquitting the defendant.
1. An Ascendant too early — under 3 degrees
The first three degrees of the rising sign are treated in the classical tradition as “not yet born.” The chart has not fully formed; in a moment another sign will rise and the whole house structure will shift.
What it means in practice: the question has not ripened. The person is curious, but the situation has not formed — the parties have not moved, the conditions have not appeared. Like asking the outcome of a job application before the post is even advertised.
The right response is to wait. Once the Ascendant passes three degrees — somewhere between ten minutes and half an hour — the same question can be asked again, and this time the chart is ready to speak.
2. An Ascendant too late — over 27 degrees
The symmetrical case, though its meaning is not symmetrical at all. With the Ascendant in the last degrees of a sign the chart is considered “finished”: the matter is already settled.
The usual classical reading is that the decision has been made and the event is already under way, beyond changing. The person may still ask, but they no longer have any influence over what they are asking about. Lilly sometimes records it as the question having been asked too late.
3. A void Moon
The Moon is void when it will complete no major aspect before leaving its sign. Lilly's line is short: in that case, “seldom does anything come to pass” in the matter asked about.
This is the most frequently met of the considerations — about 10% of any month is spent void. It does not mean “it will not happen” but “nothing is moving.” The exceptions and the duration are a subject of their own; the detail is in What Does a Void of Course Moon Mean?
4. The Moon in the Via Combusta — 15° Libra to 15° Scorpio
Latin for “the burnt road.” This thirty-degree stretch of the zodiac is counted unlucky in the classical texts: the second half of Libra is the Sun's zone of fall, and the first half of Scorpio the Moon's. Crossing it, the Moon is considered scorched.
Its reading differs from a void Moon. A void is stillness; the Via Combusta is motion out of control. Questions asked in emotional turmoil, in anger or in panic tend to fall into this stretch — and the classical rule says the answer to a question asked in such a state is not to be trusted.
Many astrologers soften the rule, counting only the exact fall point near 23° Libra or the degrees holding certain fixed stars. Astrum counts it as a warning, not as grounds for refusal.
5. Saturn in the 1st or the 7th house
The strangest-looking of the classical rules, and the one with the most meaning behind it. The two placements say different things:
- Saturn in the 1st — the question itself is corrupted
- The 1st house stands for the person asking. With Saturn there, the classical reading is that their own fear, pessimism or concealed intent has bent the question. It has not been asked straight — what is genuinely wanted is something else.
- Saturn in the 7th — the astrologer’s judgment is corrupted
- In horary the 7th house stands for the one answering. Lilly wrote this rule against himself: with Saturn there, the astrologer will be wrong. A method that writes a rule declaring its own practitioner suspect is the clearest example of the vein of honesty running through the tradition.
The second rule raises an interesting modern question: if the judgment is given by an algorithm rather than a person, who does the 7th house stand for? Astrum treats it as a warning aimed at the method itself — one of the charts whose answer should be given cautiously.
6. When one planet stands for both sides
The ruler of the Ascendant and the ruler of the topic house can turn out to be the same planet. Gemini rising, a question belonging to the 10th house, and Virgo on the 10th cusp — both significators are Mercury.
In such a chart the question “are the two significators applying to each other?” is meaningless: a planet does not aspect itself. The classical route is to use the Moon as the querent's significator and read the answer through it. In some cases the coincidence is itself counted positive — there is a natural closeness between the parties, their interests are the same.
How strictly should these be applied?
Contested even within the tradition. There are two extremes, and both are a problem:
Strict application
- ◆Any violation and the chart is not read at all
- ◆Closest to the classical text
- ◆A significant share of questions are turned away
- ◆The asker gets a closed door, not an answer
Loose application
- ◆Rules weighed as testimony, not grounds for refusal
- ◆Every question receives an answer
- ◆The warning value of the rule is diluted
- ◆Risk of a strong answer from a weak chart
The right place is somewhere between them. Ignoring a rule outright throws away an observation the people who first wrote it accumulated over centuries. Applying it strictly means, in practice, that one question in ten comes back as “not today” — and that person has received an obstacle rather than information.
How Astrum applies them
All of them are computed for the exact moment the question is asked: the degree of the Ascendant, the Moon's void status and next aspect, the Via Combusta, Saturn's house placement, and whether the significators coincide.
None of them cancels the reading on its own. They enter the rule engine as counter-testimony instead. Where the rest of the chart is strong the verdict shifts to “Yes, but”; where it is weak, to “Uncertain.” The decision is never left to the AI — a deterministic rule engine makes it, which is why the same chart produces the same answer every time it is read.
And whichever rule fired is stated plainly in the reading. Seeing “the Ascendant is at 1 degree” tells the reader why the answer is cautious. Applying a rule and then hiding it defeats the reason the rule exists.