Synastry Aspects and Orbs: Which Cross-Chart Contacts Count

The previous lesson introduced cross-chart aspects as the basic unit of synastry and recommended tighter orbs. Here we explore both: which aspects are used, how they feel, and how close they should be.

The next time you open an overlay, you will know which lines deserve attention and which can wait.

The five major aspects: recognize their characters

Synastry uses the same aspects you learned in natal astrology. These five are most common. Recognizing their character matters more than memorizing angles.

Conjunctions are strongest, but neither inherently good nor bad: two planets combine and amplify their energy. Your Venus conjunct their Mars suggests intense attraction; your Saturn conjunct their Moon may feel burdensome. Identify the two planets before judging the experience.

Trines and sextiles are harmonious, or soft, aspects. Trines flow almost effortlessly; sextiles resemble opportunities you must reach for.

Squares and oppositions are tense, or hard, aspects. They bring friction, but do not rush to call them bad. The next section explains why.

Harmony is not automatically good, and tension is not automatically bad

Beginners often celebrate trines and worry about squares. Yet a relationship with only soft aspects may lack spark and motivation to grow: things are so easy that neither person feels a reason to change.

The tension of squares and oppositions can help people refine each other. Deep, lasting relationships often include some hard aspects that press both people to communicate, adjust, and grow.

Reading synastry therefore means assessing overall balance, rather than counting soft versus hard aspects. Is there enough ease to feel comfortable, alongside enough tension to move forward? This follows the whole-chart principle.

Orbs: tighten the limit to three degrees

The next technical judgment concerns orb: how far two planets may deviate from an exact aspect angle and still count as an aspect.

In a natal chart, astro.how uses 7° for conjunctions and oppositions, 6° for trines and squares, and 4° for sextiles. Synastry cross-chart aspects tighten to 3° (2° for sextiles), the default in astro.how’s synastry aspect table. More exact aspects tend to feel clearer and more specific; wider contacts usually form background influences.

A practical classification is:

• 0–1°: core aspects. These are recurring, unmistakable relationship themes and belong in the reading.
• 1–3° (1–2° for sextiles): active aspects. They operate but are less prominent than core contacts.
• Beyond 3°: background influences. astro.how omits them from the aspect table; set them aside initially.

Tighter orbs take priority. When an overlay feels overwhelming, start with the smallest orbs: these are the relationship’s loudest voices.

Prioritizing cross-chart aspects

Combine harmonious versus tense with tight versus wide to create a reading order. Scan an overlay as follows:

1. Find tight conjunctions first, especially involving Sun, Moon, Venus, Mars, or Saturn. Regardless of ease or tension, these are major themes.
2. Find tight hard aspects next: squares and oppositions show recurring friction and growth points.
3. Then examine tight soft aspects: trines and sextiles show natural support and comfort.
4. Add 1–3° contacts last as supporting detail; temporarily set aside contacts wider than 3°.

This keeps individual details in perspective. The same priorities apply in later lessons on Sun, Moon, and Ascendant, Venus and Mars, and Jupiter and Saturn.

Degrees are not a scale of fate

Orb measures strength, not pass or fail. A 3.2° contact does not suddenly vanish beyond 3°, and a square with a 0.5° orb does not doom a relationship to pain.

Degrees indicate how noticeable an influence is, not how good or bad the relationship will be. Its quality depends on how both people respond. Treat orb as a volume control, not a verdict on fate.

Work through the priority order yourself:

With aspect types and orbs understood, you have the tools to examine any cross-chart contact. Next comes the first and most fundamental group: Sun, Moon, and Ascendant, exploring whether core identity and emotional needs are in tune.