Rating charts in astro-research

The most reliable astrological knowledge comes from accurately timed birth charts and reliably documented life stories.

The more accurate the birth time the more accurate the birth chart.

The birth time plays a crucial role in any astro-research.

More than any other factor it determines the layout of the constructed chart.

It influences the reliability of the information a chart provides.

Inaccurate and approximate birth times marred the accuracy of previous research.

The charts used in every astro-research project must be almost accurate.

In event research the dates that major events occur must be reliable.

Almost accurate birth charts and reliable case histories are priorities.

They ensure the most accurate research findings.

Rating birth data

Three bits of information comprise the birth data.

They are the time, date and place of birth.

They’re usually recorded on the birth certificate or birth record.

The birth time is the crucial factor.

It is rarely, if ever, precisely accurate.

The Rodden Rating System is used to rate birth data.

It gives a birth time that’s documented on a birth certificate or birth record a AA rating.

But research into thousands of AA birth times forces the conclusion that the accuracy of these recorded times varies greatly.

So the AA category has been modified to permit their more accurate classification.

The modified AA data classification

AA-1 – any birth time that ends in a 1, 2, 3, 4, 6, 7, 8 or 9 number of minutes.

The evidence indicates that these are the most accurate charts and the AA-1 indicates the recorded birth time has a + or – one (1) minute margin of error.

AA-2 – any birth time ending in a 5, 10, 20, 25, 35, 40, 50 or 55 number of minutes.

These are the second most accurate charts and the AA-2 indicates that the recorded birth time has a + or – two (2) minute margin of error.

AA-3 – any birth time ending in a 15 or 45 number of minutes.

The evidence indicates that some rounding-off could have occurred and the AA-3 indicates that the recorded birth time has a + or – three (3) minute margin of error.

AA-5 – any birth time occurring on the half-hour – the 30 minute mark. While some will be accurate many have been rounded off and the astrologer doesn’t know which.

The AA-5 indicates that the recorded birth time has a + or – five (5) minute margin of error.

AA-7 – any birth time occurring on the hour – any hour of the day. The evidence indicates that the practice of rounding-off the birth time to the nearest hour is still common and while some births will occur on the hour the research astrologer doesn’t know which.

The AA-7 indicates that the recorded birth time has a + or – seven (7) minute margin of error – but in some instances this may need to be increased significantly.

As the margin of error increases, the reliability of the chart decreases.

To obtain the most reliable astrological knowledge the charts used in any astro-research project should have a AA-1 birth data rating.


Astrology for Aquarius – sharing our knowledge


Move to Top