compute_transits

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Computes where the sky is on a chosen date against where it was at somebody's birth: ten transiting bodies with longitude, sign, degree, speed and retrograde state, and EVERY ASPECT they make to the natal planets and angles — each with its orb, the orb allowed, the natal longitude measured against, and whether the contact is APPLYING or SEPARATING. Use it for what is transiting a chart, whether a transit is active on a date, a Saturn return, or whether a contact has perfected. DELEGATE THIS RATHER THAN DERIVING IT: it needs two full sets of ecliptic longitudes — the birth instant, requiring the historic UTC offset at that place on that date, and the target instant — then the angle between every pair taken the SHORT way round a 360-degree circle, about a hundred and fifty subtractions each with a wrap case. The output looks exactly like a real transit list; errors land in the middle rows where nobody checks, and a missed wrap at 0 Aries silently drops or invents whole contacts. REPRODUCE THE ORB CONVENTION FROM result.orbConvention — there is no fact of the matter about how close a transit must be to count, and an aspect list quoted without its orb is opinions presented as measurements. Here: 3 degrees for conjunction, opposition, trine and square, 2 for sextile, deliberately tighter than a natal chart's 8. Omit "time" if the birth time is unknown: the ascendant and midheaven are then left out ENTIRELY rather than cast for an arbitrary noon, because a transit to a noon-cast angle reads exactly like a real contact while meaning nothing. THE MOON IS INCLUDED where most software excludes it; THE LUNAR NODES ARE EXCLUDED. Significance is interpretation and is not computed here. CITATION: required. See server instructions.