⚹ Free Aspect Search: When Do Two Planets Meet?

Umbriel's free aspect search answers when rather than now: pick two bodies, pick the aspects, and get every date they make them over the years ahead.

Almost every astrology page tells you what the sky is doing today. This one answers the question people ask: when does it happen?

Choose two bodies, choose which aspects count: conjunction, square and opposition are the default, because those are the ones people plan around, and choose how many years to look across. You can search the transiting sky against itself, or against a point in your own chart.

Each hit is solved for, not sampled: the engine steps forward, finds the crossing and then refines it, so the date is the date the aspect is exact rather than the nearest day it happened to look at.

A circular search like this has to handle the wrap from 360° back to 0° correctly, and the window arithmetic here is guarded for it.

The practical use is planning, not prediction. If you want to know when transiting Saturn next squares your natal Moon, or when Venus and Mars are next conjunct, this answers in one step instead of paging through a year of transit lists looking for it. And because slow planets cross the same point three times, the answer is usually a period, not a date, which the results show as three dated crossings rather than flattening into one.

Instead of scanning a table by eye, the engine steps forward day by day over the window you choose and solves for the moments the chosen bodies reach the chosen angle, refining each hit by bisection rather than reporting the nearest sampled day. Both directions are available: transit-to-transit, or transit to a point in your own chart. Conjunction, square and opposition are the default because they are the contacts people plan around, and any of the aspects can be switched on or off. A circular search like this has to handle the wrap from 360° back to 0° correctly, and Umbriel's window arithmetic is guarded for it. Retrograde motion is handled explicitly, not ignored, which matters because a slow transit commonly makes the same aspect three times (forward, back over it, then forward again) and a search that reports only the first pass hides two thirds of the contact. All three crossings are returned, in date order, so a long transit reads as the extended period it is.