An Astro Seek Transit Chart Calculator is a web-based tool that visualizes the positions of natal and transit planets on a zodiac wheel so you can compare moment-to-moment planetary relationships and spot close transits and aspects.

How to Use the Astro Seek Transit Chart Calculator

What this calculator does

This Astro Seek Transit Chart Calculator is a compact, WordPress-ready single-file HTML/JavaScript widget that plots natal and transit planetary positions on a circular zodiac wheel using Plotly.js. It displays natal and transit markers, draws lines for close transits (within a configurable orbital “orb”), and lets you either manually enter planetary longitudes or attempt automatic position lookups when the optional astronomy library is available. The design is intentionally responsive with a white background and a max content width of 760 pixels so it will sit cleanly between two WordPress sidebars.

Why this tool is useful

Astrologers and astrology enthusiasts use transit charts to see how current planetary placements (transits) interact with an individual’s natal chart. This calculator helps you compare both sets visually, so you can quickly identify conjunctions, oppositions, and other close aspects. By rendering the chart in Plotly, it produces interactive visuals that are mobile-friendly and accessible in a typical WordPress content area. The chart makes patterns obvious: natal planets are one color, transit planets another, and close alignments are highlighted.

How to install the calculator in WordPress

Step-by-step installation

1. Copy the single-file HTML/JavaScript code from the code canvas (the code document created for you).
2. In WordPress, go to the page or post editor where you want the calculator.
3. Add a Custom HTML block (or use your theme’s custom code injection area).
4. Paste the entire HTML file into the block. If your WordPress setup blocks external scripts, you may need to host the Plotly or astronomy libraries or allow them in your site’s CSP (content security policy). The calculator contains a fallback: manual inputs for planetary longitudes so it will still function without the optional astronomy engine.
5. Publish or update the page. The calculator will scale to the content column (up to 760px) and keep a white background to match your site layout.

How to use the interface

Entering dates and times

• Enter the natal date & time and the transit date & time using the datetime pickers. Provide a timezone offset in hours from UTC (for example, Madrid is +1 or +2 depending on DST). The timezone offset is used for approximate conversion when auto-filling positions via the optional astronomy library.

Auto-fill vs manual input

• Auto-fill: If your WordPress page can load the optional astronomy library (the code attempts to use Astronomy Engine when available), click Auto-fill positions to automatically compute approximate ecliptic longitudes for planets at the given dates. This speeds setup but depends on the library being loadable in your hosting environment.
• Manual input: If auto-fill is not available, the table of planets lets you enter ecliptic longitudes (0°–360°) for both natal and transit placements. Many astrologers obtain these longitudes from other software or ephemerides and paste them in.

Plot the chart

• After filling values, click Plot Transit Chart. The chart draws:
  • Natal planets (one color) and transit planets (another).
  • A circular zodiac guide with degree tick marks.
  • Lines connecting natal and transit positions for any planet whose separation is within the configured orb (the included default orb is 6°). You can visually inspect and identify close transits quickly.

Interpreting the output

• Markers and labels: Each planet shows its degree (rounded), so you can read exact longitudes at a glance.
• Aspect lines: Lines indicate close transits — a quick cue for conjunction-like contact. Use the numeric separation to judge intensity: smaller separations typically indicate stronger energetic influence.
• Visual wheel: The wheel helps you see how transits overlay the natal chart—especially useful when a transit planet crosses a natal planet or angle.

Customization & technical notes

• The code uses Plotly.js for interactive plotting and includes an optional script tag for the Astronomy Engine library. If your WordPress environment prevents loading remote scripts, the calculator still works as a manual-entry tool.
• The display max width is set to 760px to fit comfortably between two sidebars on common WordPress themes. If your theme’s content area is wider or narrower, adjust the max-width value within the CSS.
• The white background and light shadows are intentionally minimal to blend into WordPress content areas. You can style the surrounding container to match your theme or add additional CSS rules in your theme’s customizer.

Practical usage workflows

• Quick transit check: Enter a client’s natal longitudes (or paste them), set today’s date as the transit date, and identify any planets within 6° of natal placements.
• Event timing: Compare an event timestamp’s planetary positions against a natal chart by setting the event time as the transit date/time. Visual lines will highlight key contacts.
• Teaching & demonstration: Use the chart during lessons to show how transits overlay the natal wheel. The interactive Plotly chart allows zoom and pan for close inspection.

Disclaimer (required)

This calculator is provided for educational and entertainment use only. It gives approximate visualizations and is not a replacement for professional astrological consultation. Accuracy depends on the data and optional astronomy library availability. The tool does not provide medical, legal, or financial advice.

FAQ

Q: Is this calculator astrologically accurate?
A: It provides approximate ecliptic longitudes and visual relationships. For highest accuracy, use a trusted ephemeris or ensure the optional astronomy library is available and allowed to load on your WordPress host.

Q: What if the auto-fill doesn’t work?
A: Many WordPress hosts block remote script loading or have CSP rules. The tool is built to fall back to manual input — enter the longitudes yourself (from an ephemeris or astrology program) and press Plot.

Q: Can I change the orb or add more aspect types?
A: Yes — you can edit the JavaScript in the code block to change the orb value, add logic for trines, squares, sextiles, and visually style different aspect lines differently. For complex aspects, compute angular separation and match nearest major aspect (0°, 60°, 90°, 120°, 180°) within specified orbs.

Q: Where should I place the code in WordPress?
A: Use a Custom HTML block in the block editor or paste into a page template. If your theme or security policy blocks inline scripts, you may need to register the script in functions.php or use a plugin that allows custom JavaScript injection.

Q: Can I save charts or export them?
A: Plotly has export features. You can extend the widget with a “download image” button that calls Plotly.toImage() to export PNGs or SVGs.