The Calculation Of The Lagna. A fragment of the book of Tom Chopok Vedic astrology

How to make Your star horoscope

first, you must convert the time of birth in the value of SMV (mean local time) and SVG (mean time GMT). Using the first of these books, find the data that was observed "summer time" in the day and place of birth. If "summer time" worked, subtract 1 hour from the time of birth. Then take a book that contains information about latitudes and longitudes. For each city in any state and country where the given latitude and longitude; write down the latitude and longitude of place of birth. Following the values of latitudes and longitudes will be a column headed "change of the CMB depending on the values of the standard time." It will tell you what number of minutes should be added to or subtracted from the time of birth. Do it. Now you have the value of the CMB.

the calculation of the Lagna Fragment Volume Chopok Vedic astrology


Example of calculation of SMV

People born on January 20, 1951 in Englewood, new Jersey, at 7:13 am. Once on the book "Change of time" we find that in 1951 in new Jersey "summer time" were complied with on April 29 (starting at 2:00 a.m.) to September 30 (ended at 2:00 in the morning). Thus, "summer" has not acted in a while, when was this person born, so we do not subtract an hour. Then, once the book of latitudes and longitudes, we find that Englewood, new Jersey has a latitude of 73°W58' and longitude 40"N53'. Note the latitude and longitude and in the next column we find the change in magnitude of SMV, which is specified as a plus 4 minutes, 8 seconds (rounded to 4 minutes). We add the 4 minutes to the time of birth and get the result: the value of SMV is 7:17 am.

Calculation of SVG

We still keep in his hands a book containing the values of latitudes and longitudes. The right of the column "Change of SMV" we will find the column "time Difference between SVG and CMB". This means that you add or subtract a certain number of hours and minutes in order to know the time of birth in GMT. If the birthplace is West of Greenwich, you should add some amount of time. If it is East of Greenwich, you will need to subtract a certain amount of time from the value of the MWSS. Book containing data on latitudes and longitudes, tells us that Englewood, new Jersey, we need to add 4 hours and 56 minutes to SMV. This means that in our SVG example 7:17 until noon + 4.56 = 12:13 in the afternoon.

so, CSA = 12:13 in the afternoon.

Now we have information about date of birth, longitude and latitude of place of birth and about the values of SMV (mean local time) and SVG (mean time GMT). Now we will calculate the rising sign for this chart.

determination of the degree of ascent (rising sign)

To obtain the final stellar time, we need to add up the four numbers, then we refer to the book containing tables of houses. The first digit we get from astronomical tables, so bring your ephemeris. Let us continue the computation in our example. In determining the rising sign, we use SMV, obtained by us earlier, at 7:17 am January 20, 1951

So look in your astronomical tables January 1951 and refer to the column entitled "ST". It means "star time". You will find there's three values. Now you add these four numbers together:

1 size
20 Jan 1951 = St. =
2nd value
You add to the first value of the number of hours and minutes elapsed since midnight prior to your CMB (midnight to CMB after 7 hours, 17 minutes)
3rd value
You will add to the value of 10 seconds for each hour of the previous 2-second value (10 seconds on every hour 7 hours 17 minutes). It will be 73 seconds = 1 minute 13 seconds.
0113 (73)
4th value
Added to the previous value of 10 seconds for each 15° longitude West of Greenwich. If place of birth is East of Greenwich, then add up values 1, 2, 3 together and subtract 10 seconds for each 15° longitude East of Greenwich. In the horoscope, take for example, Englewood, new Jersey, is 74° West (almost five times of 15°), and thus the fourth value is approximately equal to 49°.

Now write this value in the usual way:


78 seconds = 1 minute 18 seconds

total: 14-73-18

Again, let's simplify: 73 minutes = 1 hour 13 minutes

total: 15-13-18

the Final amount received by us equal to 15 hours 13 minutes and 18 seconds.

This final value is called the final sidereal time.

When you get the final star, you'll write it down and get a book entitled "Tables of houses". Find the latitude corresponding to the place of birth. In our example, latitude = 40°N53', which I rounded to 41°N (if the latitude is between degrees, you should make a proportion and to find the degree of climbing it; I'll explain it later, after we find we are interested in the degree of ascent). Now you have opened your "Table of houses" at the appropriate latitude. You will see on the left edge of the page a column entitled "ST". It means "star time"; our sidereal time is equal to 15-13-18, so look at the value of 41°N on the page where we can find this time.

Not all values of the star time indicated in the table directly. For example, we see in column stellar time value 15-10-13, and below it – 15-14-16. Our final star, is somewhere between these values. Under the column for 41°N, we see corresponding values of degrees and minutes: 26-08 Capricorn and Capricorn 27-20. So, we are interested in the degree of climbing is somewhere between these two values.

For our example:

sidereal timeLatitude 40°N (Capricorn)Latitude 41°N (Capricorn)Latitude 42°N (Capricorn)
15-10-1326 5726 0817 25
15-14-1628 8927 2026 28

Now we know that our final sidereal time is somewhere between two specified values of stellar time, and it correspond to 26° or 27° of Capricorn. To find the exact value, we have to do some mathematical calculations. I use the method of proportion. Let's get acquainted with this method, as it will be needed and when evaluating the degree of ascent, as well as to determine the position of each planet.

Our final sidereal time is somewhere between the two values mentioned above. We use a form of astral time, indicating the number of hours, minutes and seconds. We know how much time has passed between two points of the star time specified in the table of houses, and we can calculate what proportion of that time is the elapsed time until our final stellar time. Here's the math: 15 hours 10 minutes 13 seconds to 15 hours 14 minutes 16 seconds 4 minutes, 3 seconds. Will put it simpler: how 243 seconds. This is the total number of stellar time elapsed between two specified in the table points.

Now take the value of stellar time, we calculated before. That's 15 hours 13 minutes 18 seconds. From the first moment of the stellar time (15 hours 10 minutes 13 seconds) to our star-time (15 hours 13 minutes 18 seconds) it took 3 minutes 5 seconds 185 seconds. Thus, the relation obtained: 185 of 243 seconds have passed. Now calculate how many degrees of Capricorn signed between the two values in the column "41°N". The angle between 26°08' 27°20' equals 1°12'. Since 1° equals 60', then this value can be written as 72'. Now we have three of the four values of our ratio, so you can easily find the fourth value. Recall that in General the proportion is written like this:

A/b = C/D or A. D/B = C. it looks exactly the same and our ratio of 185/243 = X/72 or 185.72/243 = X

hence X = 55.

We learned how different the angle of elevation from the first magnitude - 26°08' Capricorn. Adding these 55' to 26°08', will receive an amount equal to 27°03' Capricorn. This ascent corresponding to final stellar time 15-13-18. In other words, we see from the table that for the final star time 15-10-13 at 41°N, the magnitude of the ascent is 26°08' Capricorn. And we see that for 15-14-16 at 41°N, the magnitude of ascent is equal to 27°20' Capricorn. But our final sidereal time is between two time points indicated in the table, so the amount of climbing in our case must be between the values of the ascent, shown in the table. Therefore, we will form the proportion. If we know how removed we calculated the sidereal time from the first of the two listed in the table, knowing how these two point are separated from each other, we make a proportion and find out how far from the first of the two listed in the table of degrees of ascent should be our degree of ascension. Adding the removal to the first of the two listed in the table of degrees of ascent, we find the ascent corresponding to our final star time.

I know that if you didn't have before with the proportions, at first it will be hard, but if you calculate five to ten tables, it will not make you work. Now to define the degree of climbing left one very important step to the calculation of the degree of ascent. As our astronomical tables calculated according to the tropical system of astrology, to get the desired degree of climbing, we must subtract the value ayanamsa of degrees of ascent, which we found earlier. We have to subtract ayanamsa and of all the quantities characterizing the position of the planets. You will find ayanamsa on each page Rosivrucian ephemeris.

To January 1951, was given the value ayanamsa equal to 23°10'. Subtract ayanamsa of degrees of ascent. In our example, the degrees of ascent is equal to 27°03' Capricorn.

Subtract: 27-03 – 23-10 = 3°53' Capricorn (if necessary, write it down as 26°63').

so, 3°53' is finally obtained the degree of ascent or, in other words, the degree of the rising sign in the horoscope (Lagna), I have taken for example.
--Tom Chopok, Vedic astrology, 1992

article: The Calculation Of The Lagna. A fragment of the book of Tom Chopok Vedic astrology

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