A graphic ephemeris places date on one axis and a planet's zodiac longitude on the other. When apparent motion reverses, its curve turns back. The shape can help identify a period to investigate, but a pixel in a long-range chart cannot give an exact station moment. A dated table or a numerical event search is needed for that.
| 30 or 90 days | Useful for a near-term Mercury, Venus, or Mars loop and for comparing several planets around a specific date. The existing short-range graph samples at six-hour intervals and refines stations. |
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| One year | Useful for a full seasonal circuit and major outer-planet themes. The existing graph samples at twelve-hour intervals, but its table still calls for care around exact event times. |
| Five years | Useful for the visible sweep of Jupiter and Saturn and repeated Mars retrogrades. This long-range page samples daily and prints exact first-of-month reference positions. |
| Fifty years | Useful for slow Uranus, Neptune, and Pluto movement across signs. It samples weekly and prints exact first-of-year reference positions. Fast bodies are omitted to keep the view readable. |
Why the line breaks at Aries
Tropical longitude is a circle from 0° to just under 360°. A planet passing from 29° Pisces to 0° Aries continues smoothly around the sky, but a flat chart's vertical coordinate resets. A correct graph stops one stroke at the bottom and begins another at the top. A continuous vertical slash would imply a jump that did not happen.
Why a curve is not a prediction
The graph shows calculated position and apparent direction as seen from Earth. It has no birth details, houses, angular contacts, or interpretation model. A curve crossing another curve only shows equal plotted longitude at the displayed resolution. To ask whether there is a specific conjunction, inspect the exact positions and UTC time. To compare with a birth chart, use a separate natal-transit calculation that states its orb and timing rule.
How the positions are calculated
The longitude calculation uses Astronomy Engine's documented geocentric vector and ecliptic transforms. The independent calculator stops at 1800–2100 and plots Mars through Pluto. Its five- and fifty-year views do not show natal overlays or precise station markers.
Draw a five- or fifty-year graph →
Calculation and reading limits
Both views plot apparent geocentric tropical longitude for Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. The five-year view calculates a point every UTC day. The fifty-year view calculates a point every seven UTC days so the broader pattern remains manageable in a browser. Lines break at the Pisces–Aries wrap rather than drawing a false leap across the chart.
The curves show sampled positions, not exact station times. A bend may suggest a retrograde period; use the one-year graph or station calendar to inspect that period. The position table is independently calculated on each month's first day in the five-year view, or each year's first day in the fifty-year view, plus the chosen start. The downloadable CSV contains those dates and unrounded decimal longitudes.
All positions come from Astronomy Engine 2.1.19 using apparent geocentric vectors and the true ecliptic of date. No natal overlay, house, location, Chiron, or asteroid positions appear here.