Out-of-bounds planets
Kt Boehrer, Declination: The Other Dimension, 1994 — credited everywhere, always at second hand
This one is genuinely modern and has no ancient parent: no Hellenistic, Persian, Arabic or medieval source treats a planet exceeding the Sun's declination as meaning anything. One confusion is worth heading off, because the word invites it — traditional astrology does have “bounds” (Greek horia, the Egyptian and Ptolemaic terms), but those are subdivisions of zodiacal longitude used for scoring dignity. They share an English word with this and nothing else. The condition is credited to Kt Boehrer (1923–2004), an editor of a declination-focused journal, whose Declination: The Other Dimension appeared in 1994.
What it measures
The Sun's declination cannot exceed the obliquity of the ecliptic — about 23°26′ — because the Sun travels along the ecliptic by definition, and the obliquity is the angle between the ecliptic and the equator. Every other body carries some ecliptic latitude, so near the solstitial degrees it can pass that cap and stand in a band of sky the Sun never reaches. That is the entire astronomical content; the reading attached to it — that such a body operates outside the Sun's authority — is a modern interpretive claim, not an observation.
Where practitioners disagree
- What exactly is the boundary?
A fixed 23°26′, 23°27′ or 23°28′ — or the true obliquity computed for the chart's own date
The spread is not carelessness: the obliquity is falling by about 47″ per century, so a fixed constant is right for one era and slightly wrong for the rest. Boehrer's own article uses 23°28′; other writers use 23°26′.
This engine: The true obliquity of date, taken from the same house computation the chart already ran — so the threshold is this chart's sky, not a rounded textbook figure. - Geocentric or topocentric declination?
Geocentric (conventional) or corrected for the birthplace on the Earth's surface
Lunar parallax can move the Moon's declination by up to about 1° between the two — larger than the whole spread of disputed threshold values.
This engine: Geocentric, like every other position in this engine. - A yes/no flag, or how far out?
A binary out-of-bounds marker — or also reporting the excess beyond the bound
Steven Forrest, the condition's main populariser, insists the switch is absolute: “There are no shades of gray here.” Reporting the excess lets a reader judge that claim instead of taking it.
This engine: Both: the flag, and the excess in degrees. - Which bodies can be flagged?
The Moon and inner planets in most years; Jupiter, Uranus and Pluto rarely but then for long stretches; the Sun and nodes never
The Sun cannot be out of bounds because it defines the bound; the nodes lie on the ecliptic by definition. A permanently-false flag on either would be noise.
This engine: The Sun is excluded by construction and the nodes are not tested. Everything else is checked and reported.
Still open
Whether Boehrer coined the term or popularised one already circulating cannot be settled from the record. The credit is repeated across the literature but always at second hand: Forrest, its principal transmitter, writes that the term “originated with the late astrologer Kt … Boehrer in her now-rare book” — and then, in a footnote keyed to that very sentence, adds “I have never seen this book, nor been able to locate further information about it.” Boehrer's own published article claims no coinage; it presents out-of-bounds as established fact. So the attribution is undocumented at both ends.
Sources
- Kt Boehrer, Declination: The Other Dimension (1994)
- Kt Boehrer, Introduction to Declination #1 (Matrix Astrology Articles) (2000)
- Steven Forrest, The Out-of-Bounds Moon, The Astrological Journal (2012)
- Alexander Kolesnikov, Out-Of-Bounds Planets (Lunarium)
- Capitaine, Wallace & Chapront, Expressions for IAU 2000 precession quantities (2003)