Lilith calculator
Black Moon Lilith is not a body but a calculated point: the empty focus of the Moon's elliptical orbit, the second focus of the ellipse the Earth does not occupy.
Your birth details
Because the Moon's orbit is an ellipse rather than a circle, it has two foci. The Earth sits at one. The other is empty, and Black Moon Lilith is where that empty point falls against the zodiac.
There is more than one Lilith in circulation and they are different points. The mean version smooths the motion; the osculating or true version tracks the real wobble and can sit several degrees away. This calculator uses the mean position and names it with the result, because a Lilith reading that does not say which variant it used cannot be compared with anyone else's.
Lilith is a modern addition. The point was not used before the twentieth century and there is no classical doctrine behind it, so nothing on this page claims a tradition it does not have. We label it the same way we label Chiron and the nodal axis reading.
Frequently asked
What is Black Moon Lilith?
It is the empty focus of the Moon's elliptical orbit, a calculated point rather than a physical body. The Earth occupies one focus of the ellipse and Black Moon Lilith marks where the other one falls in the zodiac.
Is Lilith an asteroid?
No, and this is a common confusion. There is an asteroid named Lilith, numbered 1181, and it is a different object from Black Moon Lilith entirely. This calculator gives the Black Moon, the empty focus.
Is Lilith part of classical astrology?
No. It is a modern addition with no classical doctrine behind it, and we label it that way rather than presenting it as traditional material.