Arabic Lots and Parts
Constructed points, not bodies. An Arabic Lot is a formula — typically Ascendant plus one planet minus another — that produces a sensitive degree no telescope will ever see. Hellenistic and Arabic-medieval astrologers used them to articulate what the planets alone leave unsaid: where pleasure attaches, where necessity tightens, where courage finds its instrument. We compute the seven Hermetic Lots and a wider catalogue of named parts with Swiss Ephemeris, with day/night sect inversion handled correctly.
How a lot is built
The basic formula is Ascendant + B − A. For the Lot of Fortune in a day chart: Asc + Moon − Sun; in a night chart the order of A and B reverses, giving Asc + Sun − Moon. Spirit is the mirror of Fortune. Eros, Necessity, Courage, Victory and Nemesis each have their own pair. The reversal at night is structural, not optional — get it wrong and you read someone else's point.
The seven Hermetic Lots
Fortune for body and circumstance. Spirit for action and vocation. Eros for what one is drawn toward by desire. Necessity for what one cannot avoid. Courage for the instrument of force. Victory for faith and momentum. Nemesis for the limit, the brake, the unseen counter-weight. Each is read by its sign, house, ruler condition and aspects, exactly as a planet would be — except a lot is silent until something transits it.
Reading a lot in your chart
Find the sign and house of the lot, then the condition of its ruler. Fortune in the tenth, ruled by a dignified Saturn in the second, speaks of livelihood through structured work — even when the natal Sun says nothing of the sort. The lot does not contradict the chart; it locates where a specific theme actually attaches. Transits and profections to a lot illuminate that theme during their season. That is when the silent point speaks.
Lots inside the time-lord toolkit
Lots are the geometry that the time-lord techniques release. Zodiacal Releasing is performed from Spirit or Fortune; profected years gain a second layer when they reach a sign holding a major lot. A Mars-Saturn Firdar pair landing on the Lot of Necessity reads sharper than the same pair across an empty patch of sky. Without the lots, the chart has planets and houses; with them, it has named coordinates for love, courage, limit and grace.
Frequently Asked Questions
Are Arabic Lots Arabic in origin?
They are Hellenistic in origin and Arabic in transmission. Greek astrologers built the Lots of Fortune and Spirit; later Arabic-language sources catalogued hundreds more, often calling them sahm, "arrow". European Latin called them partes, parts. The "Arabic" label honours the medieval scholars who preserved and expanded the system.
Do lots aspect each other?
Traditional practice reads aspects from planets to lots, not lot-to-lot. A lot is a sensitive point, not an emanating body. We list aspects from natal planets and from current transits to each lot, with tight orbs — usually one to three degrees — because the points are mathematical and their effect localised.
How many lots should I use?
Start with the seven Hermetic Lots; they cover the existential vocabulary. Add others when a specific question demands them — the Lot of Marriage for partnership timing, the Lot of Children for fertility questions. Reading two hundred lots simultaneously dilutes attention and turns the chart into noise.
Why does sect inversion matter?
Because a lot computed with the wrong sect formula lands in a different sign — sometimes a different element. The technique was designed with day/night symmetry built in. Modern simplifications that ignore inversion produce a point of the right name and the wrong location, and the readings drift accordingly.