North and South Node calculator: where are my nodes?

The Moon's orbit is tilted by about five degrees to the ecliptic, the Sun's yearly path through the zodiac. The two points where the orbits cross are the lunar nodes. At the North Node, or ascending node, the Moon crosses going north; at the South Node it crosses going south, always exactly opposite. Eclipses happen only when a new or full moon falls near one of them, which is why eclipses and the nodes belong to the same geometry; the 2027 eclipse calculator shows the next ones.

The Sun's pull makes the plane of the Moon's orbit wobble, so the nodes slide backward through the zodiac and complete a full circle in about 18.6 years. On average they spend about eighteen and a half months in each sign.

There are two ways to place the node. The mean node smooths the motion into an even backward drift. The true node follows the Moon's actual orbit from moment to moment, so it rocks back and forth around the mean point; from 1900 to 2099 our engine finds the two up to about two degrees apart, and the true node even moves forward on about a quarter of all days.

Astrologers are split, and astrology programs offer both. This calculator leads with the true node and shows the mean node beside it. Most of the time both sit in the same sign. When they do not, read both descriptions; many astrologers take the true node as the finer measure and the mean node as the traditional one.

Modern astrology reads the nodal axis as a line of development. The South Node describes what comes naturally, habits and talents that fit like an old coat. The North Node points to what you are learning, the direction that feels unfamiliar and often uncomfortable, yet more rewarding the further you go. The short readings on this page pair each North Node sign with the South Node sign opposite it.

Since the node spends a year and a half in a sign, many people share yours. The house gives it a setting, and a planet close to either node brings that planet's themes to the axis. The birth chart calculator shows every planet and aspect in one wheel.

With a birth time and place the calculator gives the North Node's house in the Placidus system by default, or in whole sign, Koch or equal houses on the switch; the South Node is in the opposite house. A North Node in the tenth house with the South Node in the fourth, for example, is read as growth through public work away from the comfort of home. Without a time the house is left open.

Every 18.6 years the nodes return to their natal place, around the ages of eighteen or nineteen, thirty-seven, fifty-six and seventy-four. Astrologers read these nodal returns as moments when the direction of your life comes up for review, often around an eclipse season.

The North Node's house names the area of life the axis points toward, and the South Node in the opposite house names the familiar ground. With the North Node in the first house and the South Node in the seventh, growth is read as coming from standing on your own feet after leaning on partners. In the second, opposite the eighth, it comes from building your own resources, and in the third, opposite the ninth, from everyday learning and conversation. In the fourth, opposite the tenth, the pull is toward home and inner life, in the fifth, opposite the eleventh, toward personal creativity, and in the sixth, opposite the twelfth, toward practical routines.

The other six houses reverse those pairs. A North Node in the seventh points to growth through partnership, in the eighth through shared trust and depth, and in the ninth through study and travel. In the tenth the growth comes through a visible role in the world, in the eleventh through friends and causes, and in the twelfth through quiet reflection and letting go of control.

The mean node uses the standard formula for the mean longitude of the Moon's ascending node from Jean Meeus's Astronomical Algorithms, and agrees with the Swiss Ephemeris to within a fraction of an arcsecond. The true node is the osculating node: from the Moon's position and velocity in the ELP2000-82 lunar theory the engine finds the plane of its orbit at that instant and where that plane cuts the ecliptic. Our checks against the Swiss Ephemeris true node from 1901 to 2099 stay within one arcminute.

Because the true node moves only a few arcminutes a day, and sometimes almost stops, a small difference in position can move the time of a sign change by an hour or more. On a changeover day, treat the minute as approximate and compare with the mean node. The calculation runs in your browser. To show the first line of today's reading, your birth details are sent once to our server, which does not store them.

Your birth date and birthplace are enough for the sign; the birth time adds the house. The calculation runs in your browser and the tool is free. Once you have your node, the birth chart calculator shows it among your planets, and Chiron is the other slow point worth looking up.

The node and eclipses share the same geometry. Why eclipses matter explains the link in plain terms, the moon and eclipses guide gathers the basics, and the 2027 eclipse calculator shows the eclipses ahead. By the true node, the North Node entered Aquarius on July 26, 2026 (Eastern time) and stays until March 26, 2028. North Node in Aquarius follows that stretch house by house.