The Astrolium solar return transits calculator lists every transit hitting your solar return chart for 12 months, with a paragraph of interpretation attached to each event. Around 2,000 dated entries per year, filterable by planet, month, aspect family, and orb. Math on the Swiss Ephemeris. No login, no upload.
Most solar return tools online stop at the wheel itself. The wheel is the snapshot, but the year is the timeline. Saturn squaring your SR Sun in month three reads very differently from Jupiter trining your SR Venus in month nine, and the year unfolds as a sequence of those events. This calculator gives you that sequence with the interpretation already written.
What you get
The output is a chronological timeline grouped by month. Each entry shows the exact date and time of the aspect, the transiting planet glyph, the aspect type, the SR planet or point being hit, the orb in degrees and minutes, the direction (applying or separating), the SR house the transit falls in, and a paragraph of practitioner-grade interpretation. Filter the timeline by month, by transiting planet, by aspect family (hard, soft, conjunction), by orb tightness, or by direction. Counts update live as filters change.
The summary card shows the SR Ascendant sign and the SR Sun house, the two anchors most working astrologers read first. A month-by-month strip names the planet that dominates each calendar month, which gives you the structural rhythm of the year in one glance before you read the per-event detail.
Transits to natal versus transits to SR
The two layers do different work. Transits to natal repeat against the same fixed chart for life and show the lifetime developmental pattern: Saturn returns to its natal degree every 29 years. Transits to the solar return are local to 12 months. The SR chart's houses, angles, and Moon position redraw every birthday, so the same transit reads against a different field each year.
A working method most modern Western practitioners use: read the natal transits first to establish the period's deep theme (a Pluto square, a Saturn opposition), then read the SR transits to localise that theme into specific months and specific life areas. The SR 10th house holding the transit means career-shaped; the SR 4th house means home-shaped; the SR 5th house means creative or romantic.
For the Hellenistic frame, the profected year-lord adds a third layer. The annual profection promotes one planet to lord-of-the-year, and that planet's transits across the SR chart carry extra weight. A year where Saturn is the year-lord weights every Saturn transit in the SR timeline. Read the profections layer on the profections calculator, then come back to this timeline.
When to run it
For client work, cast the SR transits one to two months before the birthday so the client has the year-ahead forecast before the return moment. For mid-year context, cast the current year and filter to the months ahead. For retrospective work, cast the prior year and read what was already active.
The exact return moment matters because the SR Ascendant moves about 1 degree every 4 minutes. The same person born at 09:14 versus 09:23 gets different SR houses, and the transit timeline reads against those different houses. Astrolium pins the return moment to the arc-second, so the houses are stable to that precision.
How the calculator works
Drop the birth date, time, and place. Pick a return year. Submit. The math runs server-side on the Swiss Ephemeris, the same library Solar Fire and Astro Gold use under the hood. The server hits the solar return chart math once, then sweeps every transiting planet across every SR-chart point through the year, recording each crossing.
The result lands cached at the CDN edge for one year because the calculation never changes for a given birth chart and return year. Subsequent loads of the same chart and year render instantly.
Nothing is stored. Nothing is emailed. The form data lives in your browser only.
After the timeline
Three companion tools deepen the reading:
- Solar return chart calculator draws the SR wheel itself with angles, planet positions, and Moon phase. Run this before the timeline to know what is being transited.
- Transit report runs the standard transits-to-natal report for the same period. Pair the two timelines side by side to separate lifetime themes from year-specific timing.
- Profections calculator returns the annual year-lord and the activated house. Filter the SR transit timeline to the year-lord planet to find the year's structural beats.
The full predictive workspace stacks all three on one screen, with the profected year-lord highlighted across the SR timeline and the natal transit overlay underneath. See the solar return feature for that workspace. For practitioners running yearly forecasts across a client roster, see pricing for the $29 per month Pro tier.
Cross-link
Run related timing techniques: transit report, profections calculator, solar return chart, Saturn return calculator, Jupiter return calculator, progressed chart. For predictive features as a whole, see predictive timing.