Rectification of the time of birth: mathematical refinement of the radix
The basis of an impeccable forecast: restoring the true second of your birth using real dated life events.
✓ Swiss Ephemeris precision ≤ 1″ without mandatory signup
Astrological houses and horoscope angles (Asc, MC, Dsc, IC) shift at a rate of 1° for every 4 minutes of time (about 15 arc minutes per minute due to the rotation of the Earth). If the tag from the maternity hospital or the memory of the parents is wrong by only 10–15 minutes, th...
Why is rectification of the natal chart necessary?
Astrological houses and horoscope angles (Asc, MC, Dsc, IC) shift at a rate of 1° for every 4 minutes of time (about 15 arc minutes per minute due to the rotation of the Earth). If the tag from the maternity hospital or the memory of the parents is wrong by only 10–15 minutes, the cusps of the houses can jump to another sign, the planets will change houses, and the directions and solar panels will give an error of several years. Rectification (from the Latin rectus - correct and facere - to do) is an inverse astronomical task: knowing the exact dates of key turning points in the past (marriage, birth of children, moving, injuries, career ups), the astrologer selects the only moment in time at which all these events are simultaneously confirmed by predictive methods.
Two-Pass rectification algorithm in Astroprognostic
1. Life Events Questionnaire
Entering exact dates of key events: marriage/divorce, birth of a child, moving, buying a home, operations, defending a diploma, changing jobs.
2. Rough range scan (Pass 1)
Second-by-second or step-by-step scanning of a specified time interval (±15 minutes, ±1 hour or ±2 hours) along symbolic directions 1°/year.
3. Fine cross-validation (Pass 2)
Testing leading candidates through 4 techniques at once: converging directional aspects to angles, secondary progressions, transits of slow planets and solar cusps.
4. Confidence Score calculation
Ranking of found timestamps: the system calculates the percentage of matches and selects the most reliable time of birth.
Interactive rectification wizard in Astroprognostic
Astroprognostic implements a unique two-pass TwoPassRectificationSearch engine with automatic recalculation of relocation cusps for events in other cities, backup of old time and the ability to apply rectified time to the map in one click.
Calculate Your Chart Online
Enter birth date, time, and city to generate your personal chart.
Frequently Asked Questions
How many events are needed for reliable rectification? ▼
A minimum of 3-4 significant events of a different nature is recommended (one on the topic of relationships/marriage, one on career/status, one on real estate/family). Optimally - from 5 events.
What to do if the time of birth is only known approximately (“in the morning”)? ▼
In this case, the search range expands to several hours, and at the first stage the ascending sign (Ascendant) is analyzed based on the person’s appearance, manner of presentation and lifestyle.