Combust
A planet is combust when it sits within about eight degrees of the Sun, close enough that classical astrology treats it as overwhelmed by the Sun's light.
The idea is visual: a planet that near the Sun cannot be seen, and traditional texts read invisibility as a loss of independent voice. The planet still acts, but through the Sun's agenda rather than its own.
Closer still, within about seventeen minutes of arc, the same planet is cazimi and the tradition reverses the judgement entirely.
Frequently asked
How close is combust exactly?
Most sources use 8 degrees 30 minutes, with the wider zone from there to about 17 degrees called under the beams.
Is combustion bad?
It is a condition, not a verdict: the planet works through the Sun rather than beside it.