Lunar Standstill Calculator
The Moon’s declination envelope oscillates on an 18.6-year nodal cycle. At a major standstill the Moon reaches approximately ±28.7°, well outside the Sun’s own ±23°26’ envelope. At the minor standstill 9.3 years later it shrinks to ±18.3°. Between those two extremes the Moon slides in and out of bounds monthly. This calculator shows every major and minor peak from 1900 to 2100 and locates any birth date in the cycle.
Current cycle
Most recent
Major standstill
December 22, 2024 · ±28.7°
Upcoming
Minor standstill
July 6, 2033 · ±18.3°
Your birth standstill
Enter your birth date to see which phase of the 18.6-year envelope your birth Moon falls into. This is not a full natal computation; it locates your birth year within the nodal cycle.
Standstill timeline, 1900-2100
| Year | Peak date | Kind | Peak |declination| |
|---|---|---|---|
| 1913 | September 1, 1913 | Major | ±28.7° |
| 1922 | April 15, 1922 | Minor | ±18.3° |
| 1932 | February 28, 1932 | Major | ±28.7° |
| 1941 | March 30, 1941 | Minor | ±18.3° |
| 1950 | August 29, 1950 | Major | ±28.7° |
| 1959 | November 14, 1959 | Minor | ±18.3° |
| 1969 | April 11, 1969 | Major | ±28.7° |
| 1978 | September 26, 1978 | Minor | ±18.3° |
| 1987 | September 15, 1987 | Major | ±28.7° |
| 1997 | February 12, 1997 | Minor | ±18.3° |
| 2006 | September 15, 2006 | Major | ±28.7° |
| 2015 | October 24, 2015 | Minor | ±18.3° |
| 2024 | December 22, 2024 | Major | ±28.7° |
| 2033 | July 6, 2033 | Minor | ±18.3° |
| 2043 | April 19, 2043 | Major | ±28.7° |
| 2052 | May 4, 2052 | Minor | ±18.3° |
| 2061 | October 24, 2061 | Major | ±28.7° |
| 2070 | December 6, 2070 | Minor | ±18.3° |
| 2080 | May 14, 2080 | Major | ±28.7° |
| 2089 | November 16, 2089 | Minor | ±18.3° |
| 2098 | November 4, 2098 | Major | ±28.7° |
Track every moon standstill against your natal chart
Create a free account to see how each major and minor standstill activates your natal moon, nodes, and personal planets.
What is a lunar standstill?
The Moon’s orbital plane is tilted 5.14° relative to the ecliptic. The intersection of those two planes (the lunar nodes) slowly precesses westward around the zodiac, completing a full revolution every 18.61 years. Because the ecliptic itself is tilted 23.4° relative to the celestial equator, the Moon’s maximum declination varies between 23.4° + 5.14° ≈ 28.54° when the nodes align with the equinoxes (major standstill), and 23.4° − 5.14° ≈ 18.26° when they align with the solstice points (minor standstill).
Archaeoastronomers have traced major standstill alignments in Neolithic and Bronze Age monuments across the British Isles, including Callanish on the Isle of Lewis where the Moon “rolls” along the southern horizon only at major standstill, and at Chimney Rock in Colorado where the major standstill alignment frames a visible axis between two rock pillars. Stonehenge also carries a major-standstill axis, although scholars continue to debate its intentionality.
Major vs minor standstills
A major standstill is the half of the cycle when the Moon reaches past the Sun’s own envelope. Anyone born during that window inherits a Moon with access to the OOB archetypal space described elsewhere on this site. The most recent major standstill peaked in late December 2024 and the cycle keeps producing high-declination moons through roughly September 2025. Historical major standstills: 1913, 1932, 1950, 1969, 1987, 2006, 2024-2025. The next major standstill after this one peaks around April 2043.
A minor standstill is the opposite half: the Moon’s declination envelope shrinks, and no moon can reach out-of-bounds anywhere in the world. The next minor standstill peaks around July 2033. Moons born during minor standstills tend to carry a different texture — practitioners working in this tradition (including Demetra George and Richard Tarnas) describe them as “held by the Sun’s rules” in a way major-standstill moons are not.
Modern astrological interpretation
Standstill phases of the 18.6-year cycle provide a backdrop against which individual natal moons behave. A natal moon born at +24° during a major-standstill year is “inheriting the envelope” directly; the same natal degree during a minor-standstill year reads as simply a high moon inside bounds. Transit work compounds this: when transiting Moon reaches its standstill peak, natal OOB bodies tend to reactivate and receive an unusual amount of reflective light.
The 2024 peak coincided with a period of visible cultural reappraisal of inherited lunar symbolism in popular astrology, and multiple practitioners (Tarnas, George, and Westin among them) marked it as a transition moment for the field itself. Whether or not you place weight on that framing, the mathematical cycle is well-defined and the peaks are calculable to the day.
More Free Tools
Declination Graph
Plot the declination of the Moon, Mercury, Venus, Mars, and Pluto over any time window. Watch out-of-bounds excursions and parallel crossings.
Declination Calculator
See each planet's declination, flag out-of-bounds bodies beyond the Sun's ±23°26' envelope, and detect parallel and contraparallel aspects.
Moon Out-of-Bounds Dates
Every Moon out-of-bounds window from 2015 to 2035. The Moon goes OOB monthly during the major-standstill phase of the 18.6-year cycle.
Frequently Asked Questions
What is declination in astrology?
Declination is a body's angular distance north or south of the celestial equator, measured in degrees. Unlike zodiac longitude, it is a physical sky coordinate, so it does not depend on house system, tropical vs sidereal zodiac, or any other framing choice. Every chart has both a longitudinal axis and a declination axis.
What does 'out of bounds' mean?
A planet is out of bounds when its absolute declination exceeds the Sun's own maximum of about 23°26' (the obliquity of the ecliptic at J2000). Moon, Mercury, Venus, Mars, and Pluto can all go OOB; Jupiter, Saturn, Uranus, and Neptune cannot. An OOB body behaves as if it has stepped outside the Sun's envelope and is operating on its own rules.
What is a parallel aspect?
Two planets are parallel when they share the same declination within a 1° orb (north-north or south-south). Parallels behave as declination-axis conjunctions and often show strong affinity even when no zodiacal aspect is present. Traditional sources including Ptolemy, Kepler, and Sepharial treated parallels as important on their own.
What is a contraparallel?
A contraparallel occurs when two planets have equal but opposite declinations (for example +12° and -12°) within a 1° orb. It functions as a declination-axis opposition: the bodies are matched in intensity but poled against each other across the celestial equator.
Why aren't all the planets in the out-of-bounds table?
Jupiter, Saturn, Uranus, and Neptune orbit close to the ecliptic, so they cannot exceed obliquity and never go out of bounds. Pluto is the exception because its orbit is tilted ~17°, which combines with the 23.4° ecliptic tilt to push its declination past 23.4° for roughly one quarter of its 248-year orbit.
Does house system affect declination?
No. Declination is a physical equatorial coordinate. It does not depend on Placidus, Whole Sign, Porphyry, Koch, Campanus, Regiomontanus, or any other house system. This makes declination useful when a birth time is uncertain, because house-dependent signals are the first to degrade under time error and declination is not one of them.
Is a contraparallel the same as an antiscion?
No. A contraparallel matches bodies by declination across the celestial equator. An antiscion matches bodies by ecliptic longitude reflected across the Cancer-Capricorn solstice axis. They often point at the same body pairs but they are computed on different axes and carry slightly different meanings.
How accurate are the declinations on this page?
We compute declinations from NASA's DE440s ephemeris (via the ANISE / JPL toolkit) to arcsecond precision. Out-of-bounds status is flagged at the ±23.4393° J2000 threshold; epoch-of-date obliquity drifts by about 0.013° per century from this value, which is well below the resolution of any traditional OOB claim.