Keep the raw calculation separate from your interpretation. When birth time is unknown, omit every step that depends on houses, Ascendant, Midheaven, or angles.
Step 1Confirm permission and purpose
Use another person’s birth details only with an appropriate reason and permission. Define whether the comparison is for communication, friendship, family, work, or romance.
Step 2Verify both charts independently
Check dates, local times, places, timezones, zodiac, and house settings. Mark either time as unknown when necessary.
Step 3Start with Moon and Mercury contacts
Look at regulation and communication before attraction. Record exact aspects and orbs rather than assigning generic labels.
Step 4Add Venus, Mars, Jupiter, and Saturn
Explore preference, initiative, encouragement, standards, endurance, and pressure. Never interpret attraction contacts as consent.
Step 5Use angles and overlays only when valid
Ascendant, Midheaven, and house overlays require reliable times. Omit them if either time is unknown.
Step 6Write strengths and growth edges separately
For every tension, name a possible resource or repair move. For every easy contact, note what still needs conscious participation.
Step 7Create questions for a real conversation
End with prompts both people can answer directly. The chart should make assumptions discussable, not replace the discussion.
Quality checks
- Use nicknames rather than full names.
- Do not publish the full wheel or raw inputs.
- Label any score as a heuristic, not probability.
- Delete third-party data when the purpose ends.
Frequently asked questions
Can synastry show whether someone loves me?
No. It cannot reveal another person’s private feelings or consent. Ask them and observe behavior.
Can I compare charts when one birth time is unknown?
Yes for many planet-to-planet aspects. Omit houses, angles, and time-sensitive Moon claims.
What is the best compatibility score?
No score is objective. Examine the aspect-level evidence and real relationship behavior instead.