The most accurate astrological science requires an accurately timed birthchart and a detailed life story. The more accurate the birth time the more accurate the birthchart. Approximate birth times and inaccurate birthcharts do not display an accurate mathematical model of the character and they don’t provide accurate astrological data. Inaccurate and approximate birth times marred previous research. So only the most accurately timed AA charts should be included in any astrological research project. This is a priority.
As the astrological starting point the birth time plays a crucial role in any astro-research. It not only determines the layout of the constructed chart it influences the accuracy and authenticity of the information provided by the chart and the Rodden Rating System was devised to address this issue of birth time accuracy. The system gives any recorded birth time a AA rating but research into thousands of AA recorded birth times forces the conclusion that the accuracy of the birth times within this AA category varies greatly. So based on this research Rodden’s AA category has been modified to permit a more accurate classification of any birth time that qualifies due to its birth certificate status.
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 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.
When it comes to birth times the astrologer is a victim of circumstance. The facts are that (1) astrologers work with birth times recorded by other people; (2) these times are rarely – very rarely – 100% accurate; and (3) the astrologer doesn’t know just how accurate the recorded time really is. So the indications are that the most authentic astrological information is going to be provided by research projects where charts with a AA-1 rating are used to provide the data.