Unveil the shadow side of your personality by precisely calculating the placement of Black Moon Lilith (True or Mean) in your natal chart. Enter your birth details below to discover its sign, house, and the powerful, untamed energy it represents.
Black Moon Lilith Calculator
Your Black Moon Lilith Placement:
Detailed steps will appear here after calculation, showing the conversion of your time/location and the astronomical lookup process.
Black Moon Lilith Calculator Formula:
Where:
Geocentric Coordinates = (Latitude, Longitude) of Birth Location
BML (True) = Osculating Apogee of the Moon’s Orbit
BML (Mean) = Smoothed, average position of the Moon’s Apogee
Variables:
- Date of Birth (DOB): Required. Used to determine the exact moment in the astronomical calendar for planet placements.
- Time of Birth (TOB): Highly recommended. Necessary to calculate the precise degree of BML and, crucially, its placement within one of the 12 houses.
- Birth City / Location: Required. Determines the local time zone offset and, most importantly, the latitude and longitude needed for house system calculations (e.g., Placidus or Koch).
Related Calculators:
What is Black Moon Lilith?:
Black Moon Lilith (BML) is not a physical body but rather a mathematical point in the lunar orbit. Specifically, it marks the apogee—the point where the Moon is farthest from the Earth. Astrologically, it represents the raw, unadulterated feminine power, suppressed desires, and the area of life where we feel most alienated, powerful, or defiant against societal norms.
There are two common calculations: True Lilith (the actual, highly irregular orbital point) and Mean Lilith (a smoothed average of the orbital point). This calculator focuses on the core themes of the BML position in your natal chart, revealing where you must confront your deepest, often instinctual, impulses. Its sign describes the energy, while its house describes the life area.
How to Calculate Black Moon Lilith (Example):
Calculating BML involves high-precision astronomical software, but here is the essential three-step process:
- Gather Geocentric Data: Convert the user’s Date, Time, and Location into a Julian Date and the corresponding geocentric latitude and longitude coordinates.
- Determine the Lunar Apogee: Query the astronomical ephemeris (a table of planetary positions) for that exact moment to find the precise longitude of the Moon’s apogee (Lilith).
- Convert to Astrological Sign: Translate the 0-360 degree ecliptic longitude back into the zodiacal sign, degree, and minute (e.g., 200° is 20° Scorpio). If house placement is desired, this longitude is combined with the Ascendant and Midheaven angles derived from the birth time and location.
Frequently Asked Questions (FAQ):
- Is the Black Moon Lilith calculator accurate?
- Yes, professional calculators use high-precision astronomical data (ephemerides) to ensure accuracy to the arc-minute, based on the coordinates you provide.
- What is the difference between True and Mean Lilith?
- True Lilith is the exact, constantly changing point of the apogee, resulting in “jumps.” Mean Lilith is a calculated average that moves smoothly. Most astrologers use the Mean position for natal chart work.
- Does the birth time matter for Lilith?
- Yes, time is critical. While the sign of Lilith may not change much over a few hours, the exact degree is highly sensitive to time, and the house placement is entirely dependent on an accurate birth time and location.
- What does a high degree BML mean?
- The degree (0 to 29) indicates the intensity or maturity of the energy. A high degree (e.g., 28°) suggests the person is close to completing their “lesson” in that sign’s energy, having integrated most of its themes.