Guest guest Posted August 24, 2001 Report Share Posted August 24, 2001 I'm trying to calculate the planetary positions only, not the house positions. Is the following methodology sound? What other calcs would I need to include? Thanks to Phyll Chubb for getting me started >One way of casting a chart is to use Greenwich Mean >Time (GMT) as a standard reference point. This allows >us to cast charts for anywhere in the world once we >can plot where the planets are located, based on the >equivalent of the local time to GMT. > >The first information we require will be the latitude >(degrees north or south of the equator)and longitude >(degrees east or west of Grennwich) of your place of >birth, followed by the local time of your birth. > >There is a formula which will convert the longitude >into degrees and minutes of space. The formula is: One >degree of space is equivalent to four (4) > minutes of time. As an example: If your birth place >was 120 degrees west of Greenwich you would multiply >120 degrees of space X 4 minutes of time to get > an answer of 480. Now we must convert the 480 >minutes of space into time. This is done by dividing >60 (there are 60 minutes in one hour) into 480. > >Once this is done we get the answer of 8 hours. >Therefore we can say this imaginary place of birth >will be 8 hours behind GMT since we are going west. > >If, we were looking for the distance between GMT and >120 degrees east of GMT we would be able to say the >time at the place of birth would be 8 hours > ahead of GMT. > >We're using New York at noon as our standard. We >have to determine how far ahead or behind they are in >time by calculating the difference between their birth >longitude and NY. Then adding or subtracting the >amount of time to aquire the ephemeris data for that >time. > >Then we prorate the planets positions based on the >direction they are moving, and how fast they move in >the 24 hours when the adjusted time falls. > >If the subject was born at an adjusted time of 2pm - >then we'd assume that the planets had moved 2/24ths (2 >hours forward towards a total of 24 hours) of the way >towards their position at 12 noon the next day. > Quote Link to comment Share on other sites More sharing options...
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