Orb

"[...] Although these are the degrees of separation when an aspect is exact, the "orb" of an aspect is how far off from exact it can be and still operate. Most practitioners use an orb of 7 to 8 degrees for major aspects, 1 to 2 degrees for minor aspects, and up to 12 degrees for major aspects with the Sun or Moon involved."

source: https://www.astrograph.com/learning-astrology/aspects.php