Besieged Planet Calculator — When Mars and Saturn Flank a Planet

What a siege looks like

Take any planet and name the signs on either side of it. If Saturn fills one of those two signs and Mars fills the other, the planet is besieged. One jailer in front, one behind, and the doors are the only signs adjacent to the cell.

The order of the jailers does not matter. Saturn behind with Mars ahead is a siege, and Mars behind with Saturn ahead is the same siege. The tradition cared about the enclosure, not the rotation.

Only the two classical malefics can besiege. Two benefics on either side would be a welcome guard of honor, not a blockade. And a malefic cannot be its own prisoner, so Mars and Saturn are never listed as besieged by this tool.

How we test the flanks

For every planet in the chart, we compute the index of its sign, then look at the sign one before and the sign one after, wrapping around at the edges of the zodiac. Those are the two flank positions.

We then check where Saturn and Mars sit. If one occupies each flank, the planet between them goes on the report, and the tool names which jailer stands on which side.

The test is measured on signs, not degrees. A siege holds whether the malefics sit at one degree of the flanking signs or at twenty-nine. That is the classical rule, and it makes the finding coarse but stable.

What the report returns

For each besieged planet the tool prints:

• The besieged body: glyph, name and the sign it is trapped in.
• The predecessor: the malefic occupying the sign just behind it.
• The successor: the malefic occupying the sign just ahead.
• If no planet is besieged, the report says so plainly, which is the answer for most charts.

A worked example: Jupiter under guard

The canonical London chart at 1 January 2000, 17:30 UT has no siege at all. Jupiter sits in Aries and Saturn guards one flank from Taurus, but Mars stands in Aquarius, not in Pisces. The side toward Pisces is open, so nobody is boxed in and everyone can step sideways.

Three days later, on 4 January 2000 at London noon, the sky tells a different story. Mars has crawled out of Aquarius and crossed into Pisces. Jupiter is still in Aries, and Saturn is still in Taurus. Now both flanks of Jupiter are filled by malefics.

So Jupiter is besieged, hemmed between Mars behind and Saturn ahead. The planet of expansion sits in the sign between the two malefics, and the tradition would read its growth as boxed in for the season.

That three-day flip is the nature of the rule. Sieges form and break as bodies cross sign boundaries, and a planet near a cusp can change status overnight. If your own chart sits near such a date, check both days.

Reading the besieged planet

Start with the prisoner. Each planet governs a different territory, so a siege on Mercury crowds the mind, a siege on Venus crowds love and money, and a siege on the Moon crowds the emotional self.

Then read the two jailers as two different pressures. Saturn says no, slow and cold. Mars says fight, hot and quick. Being caught between them is the feeling of dealing with one problem that delays and another that provokes.

Finally, ask what signs the siege sits in. The signs describe the territory of the blockade, and they set the stage. The same pair of jailers guards very differently in cardinal fire as opposed to fixed earth.

It also helps to ask how long the siege will last. Mars is the fast partner, crossing a sign in six weeks at speed and lingering in one for nearly three months when retrograde. Saturn stays in its sign for two and a half years. So a siege formed by a transiting Mars around a stationary Saturn opens and closes on the Martian clock, and the reading is a season, not a lifetime.

What this tool does not claim

A siege is a sign-level picture, not a degree-level one. Nothing here proves that the malefics form close orbs to the besieged body, and most actual sieges do not include a tight aspect at all.

The classical authors weighed a siege by sect and by dignity, and a well-dignified prisoner was read as coping far better than a weak one. That layer lives in the Traditional Chart page, not in this calculator.

Not being besieged is the normal condition. With only two jailers on a twelve-sign wheel, true sieges are uncommon, and an empty report here is information about open space, not a broken tool.

Our method in one line

Positions come from sub-arcsecond astronomy (VSOP87/ELP via astronomy-engine), read through Porphyry quadrant houses (whole-sign available on every chart). The siege test checks Saturn and Mars against the two signs flanking each planet, as described above. Every worked-example figure is reproduced by an automated probe. Reviewed by Dr. Amara Osei, Astronomy Reviewer.