Orb

Definition

In astrology, an orb is the degree of separation within which an aspect is still considered operational. Aspects, such as conjunctions, squares, or trines, are not exact in most cases. The orb determines how many degrees away from the exact aspect the planets can be while still exerting a meaningful connection. Wider orbs are usually applied to luminaries (Sun and Moon), while tighter orbs are used for minor aspects or faster-moving planets. A standard orb may vary based on the astrologer’s methodology, but common ranges are 0°–10° for major aspects and 0°–3° for minor aspects. The concept of orbs allows astrologers to account for the symbolic influence of aspects even when they are not mathematically precise. Overlapping orbs can also result in aspect patterns, such as a T-square or Grand Trine.

In a chart

In a natal chart, an orb is observed by measuring the angular distance between two planets or points. If the degree of separation falls within the accepted orb for a given aspect, it is considered active. For example, if the Sun is at 15° Aries and the Moon is at 19° Aries, this conjunction is within a 4° orb and thus valid. Be attentive to the type of aspect and the planets involved, as luminaries often allow for wider orbs than minor aspects or outer planets.

Examples

• A trine between Venus at 22° Leo and Mars at 26° Sagittarius (4° orb).