The Monthly Graphic Ephemeris is a screen that summarizes a full month of celestial movement in a single diagram. Independent of any individual’s birth data, it lets you view that month’s planetary tracks, sign changes (ingresses), aspect formations, moon phases, and retrograde/direct stations all at a glance, like a calendar.
Prerequisite: This screen operates independently of birth data. When you open the page, data for the current year and month is displayed automatically. If you change the year, month, or time zone, press the “Calculate” button (only the time zone is reflected automatically).
Contents of this page
1. Screen layout and how to switch months
There are no dedicated “next month” or “next year” buttons. You specify the year by numeric input and the month via a dropdown, then press the “Calculate” button to draw that month’s chart. The moment you open the page, the device’s current year and month are set automatically, and the current month’s data is displayed right away.
The screen is drawn entirely within a single Canvas (one drawing area), including the grid, planetary tracks, symbols, and legend. Since the width changes depending on the number of days in the month, you can scroll horizontally if it doesn’t fit.
2. Year, month, and time zone settings
| Item | Options / Range | Default | Notes |
|---|---|---|---|
| Year | 1800–2200 | Current year | Applied by pressing “Calculate” after changing |
| Month | 1–12 | Current month | Applied by pressing “Calculate” after changing |
| Time zone | UTC+14:00〜UTC-12:00 (including 30- and 45-minute offsets) | Saved value from the settings screen (JST if not set) | Automatically recalculated on the spot when selected |
3. How to read the chart (grid and planetary tracks)
Grid
The vertical axis shows degrees within a sign (0–30°, with a thick line every 10 degrees and a dashed line every 5 degrees), and the horizontal axis shows the dates of that month. Day numbers and weekdays are listed along the top; Sundays are shown in red-toned text and Saturdays in blue-toned text, with weekend columns lightly shaded.
Planet color coding
| Planet | Symbol | Color |
|---|---|---|
| Sun | ☉ | Magenta |
| Moon | ☽ | Ochre |
| Mercury | ☿ | Blue |
| Venus | ♀ | Orange |
| Mars | ♂ | Red |
| Jupiter | ♃ | Green |
| Saturn | ♄ | Brown |
| Uranus | ♅ | Blue |
| Neptune | ♆ | Purple |
| Pluto | ♇ | Gray |
| Chiron | ⚷ | Gray |
| Mean North Node | ☊ | Gray (dashed) |
Only these 12 bodies are displayed (the four major asteroids, the South Node, Lilith, and ASC / MC are not shown on this screen). Retrograde motion is drawn with the same color and line style; you read the direction of movement from the slope of the line. When a track crosses a sign boundary (0°/30°), the line wraps around vertically.
4. Ingress, aspect, moon phase, and retrograde markers
Ingress (sign change)
At the moment a planet crosses into a new sign, a marker showing the zodiac sign symbol inside a circle is displayed. The circle color corresponds to the element (Fire = red tones, Earth = gold tones, Air = blue tones, Water = green tones). A dedicated row at the top of the chart also lists all ingresses, pairing the planet symbol with the sign symbol.
Aspects
Where planetary tracks intersect, the following symbols are displayed (the orb is 1° for all aspect types).
| Aspect | Symbol | Angle |
|---|---|---|
| Conjunction | ☌ | 0° |
| Opposition | ☍ | 180° |
| Trine | △ | 120° |
| Square | □ | 90° |
| Sextile | ✶ | 60° |
Moon phases
New Moon (black circle with gold rim), First Quarter (right half illuminated), Full Moon (gold circle), and Last Quarter (left half illuminated) are displayed within the chart together with the time of occurrence.
Retrograde / Direct
At the point where a retrograde period begins, the planet symbol plus “R” is displayed; at the point of return to direct motion, the planet symbol plus “D” is displayed. A list of ingress, retrograde, and direct events is also shown at the bottom of the chart, separated into the Moon and the other planets.
5. Tooltip
When you hover the mouse cursor over the chart, a popup shows information for that date/time and degree. You can check a list of nearby planets (symbol, name, sign, degree) as well as a list of aspects in effect at that point in time. If none apply, “No aspects” is displayed.
6. Printing and saving images
| Button | Action |
|---|---|
| Converts the chart to an image, opens it in a new tab, and then opens the browser’s print dialog. | |
| Save image | Downloads the chart as a PNG image (file name “ephemeris_year-month.png“). |
Even when viewing in dark mode, the print and image-save output is always rendered in light mode colors (white background).
7. Useful specifications to know
- Compensation for dates spanning time zones: Because the selected time zone can shift the start and end of the month, data for the previous and following months is also fetched internally so nothing is missing or duplicated in the display. The tooltip may show notations such as “end of previous month” or “next month +n days.”
- Legend: The legend for planets, aspects, moon phases, and retrogrades is drawn together at the bottom of the chart.
- Supported languages: Japanese, English, Spanish, Italian, Portuguese, French, and German are supported (7 languages).