This calculator helps you determine the astrological aspect between a natal planet in your birth chart and a transiting planet for a specific date. Understanding these aspects can offer insights into current energies and life themes.
Select Planet
Sun
Moon
Mercury
Venus
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
North Node
Select Sign
Aries
Taurus
Gemini
Cancer
Leo
Virgo
Libra
Scorpio
Sagittarius
Capricorn
Aquarius
Pisces
Select Planet
Sun
Moon
Mercury
Venus
Mars
Jupiter
Saturn
Uranus
Neptune
Pluto
North Node
Select Sign
Aries
Taurus
Gemini
Cancer
Leo
Virgo
Libra
Scorpio
Sagittarius
Capricorn
Aquarius
Pisces
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margin-top: 10px;
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function convertPositionToDegrees(degree, signIndex) {
var signDegrees = parseInt(signIndex) * 30;
return signDegrees + parseFloat(degree);
}
function calculateAspect() {
var natalPlanetType = document.getElementById("natalPlanetType").value;
var natalDegree = document.getElementById("natalDegree").value;
var natalSign = document.getElementById("natalSign").value;
var transitPlanetType = document.getElementById("transitPlanetType").value;
var transitDegree = document.getElementById("transitDegree").value;
var transitSign = document.getElementById("transitSign").value;
var orbValue = document.getElementById("orbValue").value;
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
// Input validation
if (!natalPlanetType || !transitPlanetType || !natalSign || !transitSign) {
resultDiv.innerHTML = "Please select both natal and transiting planets and their signs.";
return;
}
if (isNaN(parseFloat(natalDegree)) || parseFloat(natalDegree) 29) {
resultDiv.innerHTML = "Please enter a valid Natal Degree (0-29).";
return;
}
if (isNaN(parseFloat(transitDegree)) || parseFloat(transitDegree) 29) {
resultDiv.innerHTML = "Please enter a valid Transit Degree (0-29).";
return;
}
if (isNaN(parseFloat(orbValue)) || parseFloat(orbValue) 180) {
angularDifference = 360 – angularDifference;
}
var aspects = {
"Conjunction": 0,
"Sextile": 60,
"Square": 90,
"Trine": 120,
"Opposition": 180
};
var foundAspect = "No major aspect";
var exactOrb = angularDifference; // Default to the raw difference if no aspect found
var aspectName = "";
for (var aspect in aspects) {
var idealAngle = aspects[aspect];
var differenceFromIdeal = Math.abs(angularDifference – idealAngle);
if (differenceFromIdeal <= parseFloat(orbValue)) {
foundAspect = aspect;
exactOrb = differenceFromIdeal;
aspectName = aspect;
break; // Found the closest major aspect within orb
}
}
var natalSignName = document.getElementById("natalSign").options[document.getElementById("natalSign").selectedIndex].text;
var transitSignName = document.getElementById("transitSign").options[document.getElementById("transitSign").selectedIndex].text;
var output = "Natal " + natalPlanetType + " at " + parseFloat(natalDegree).toFixed(1) + "° " + natalSignName + "";
output += "Transiting " + transitPlanetType + " at " + parseFloat(transitDegree).toFixed(1) + "° " + transitSignName + "";
output += "Angular Difference: " + angularDifference.toFixed(2) + "°";
if (foundAspect !== "No major aspect") {
output += "Aspect: " + aspectName + " (within " + parseFloat(orbValue).toFixed(1) + "° orb)";
output += "Exact Orb: " + exactOrb.toFixed(2) + "°";
} else {
output += "No major aspect found within " + parseFloat(orbValue).toFixed(1) + "° orb.";
}
resultDiv.innerHTML = output;
}
Understanding Planetary Transits and Aspects
In astrology, a "transit" refers to the current positions of the planets in the sky as they move through the zodiac, relative to the fixed positions of the planets in your birth (natal) chart. These transiting planets form angles, or "aspects," to your natal planets, which are believed to trigger specific energies, events, and psychological themes in your life.
What are Aspects?
Aspects are the angular relationships between planets in a chart. They represent the dynamic interplay between different planetary energies. Major aspects are typically considered to be:
Conjunction (0°): A powerful blending or intensification of planetary energies. It can signify new beginnings or a strong focus on the combined themes of the planets involved.
Sextile (60°): An aspect of opportunity and ease. It suggests harmonious energy flow and potential for growth, often requiring conscious effort to utilize.
Square (90°): A challenging aspect that creates tension and friction. It often indicates areas where effort, resolution, and change are needed, leading to growth through overcoming obstacles.
Trine (120°): A harmonious and flowing aspect. It represents natural talent, ease, and good fortune, where energies blend effortlessly.
Opposition (180°): An aspect of awareness, balance, and confrontation. It highlights polarities and can bring issues to a head, requiring integration or resolution between opposing forces.
The Role of Orb
An "orb" is the allowable margin of error, or the degree range, within which an aspect is considered to be active. For example, if a Square aspect is exactly 90 degrees, an orb of 5 degrees means that any angle between 85 degrees and 95 degrees would still be considered a Square. The tighter the orb (smaller the number), the stronger and more potent the aspect is believed to be.
How to Use This Calculator
To use this Transit Aspect Calculator, you will need two pieces of information:
Your Natal Planet Positions: These are the exact degrees and signs of the planets at the moment of your birth. You can find this information in your personal birth chart, which can be generated by many online astrology services or astrological software.
Transiting Planet Positions: These are the current (or a specific date's) exact degrees and signs of the planets. You can find this in an astrological ephemeris or by looking up current planetary positions online.
Simply select the natal planet you wish to analyze, input its degree and sign, then do the same for the transiting planet you're interested in. Set your desired orb, and the calculator will tell you if a major aspect is formed and its exactness.
Example Scenario:
Let's say your Natal Sun is at 10° Aries. You want to see how Transiting Jupiter at 12° Cancer is affecting you with an orb of 5°.
Input "Sun" for Natal Planet, "10" for Natal Degree, "Aries" for Natal Sign.
Input "Jupiter" for Transiting Planet, "12" for Transit Degree, "Cancer" for Transit Sign.
Input "5" for Orb.
The calculator will determine that Natal Sun (10° Aries) and Transiting Jupiter (12° Cancer) are approximately 92 degrees apart. Since 92 degrees is within 5 degrees of a 90-degree Square aspect (90 ± 5 = 85-95), the calculator will identify this as a Square aspect with an exact orb of 2 degrees. This suggests a period of growth through challenge or tension related to your core identity (Sun) and expansion/opportunity (Jupiter).
This tool is designed to help you quickly identify and understand the angular relationships that are key to interpreting astrological transits.