Astro Guide Mysore
Lagna / Ascendant CalculationInput : 1. P.O.B, 2. T.O.B and 3. D.O.B
From Lahiri's Indian Ephemeris (page 144 to 158)
Place Longitude :
Place Lattitude :
1. I.S.T of birth (AM / PM) : h m s
2. LMT correction (where the place longitude/lattitude is available :
and next column of longitude)
3. LMT at P.O.B (AM / PM) (step 1 + 2) :
4. S.T at 12 Noon on Birth Date, Birth Month and Birth Year :
for 82 deg 30 mins (from Table of Asc : Table no. 1 pg 2 & 3)
5. Correction for Birth Year :
(From Table of Asc Table no. 11 page 3 & 4)
6. S.T at 12 Noon on Birth Date, Birth Month and Birth Year :
for 82 deg and 30 mins (step 4 + 5)
7. Correction for Place of Birth (where the place longitude / :
lattitude is available and last column)
8. S.T at 12 Noon on Birth Date, Birth Month and Birth Year :
at the Place of Birth (step 6 + 7)
9. Time interval (TI) between 12 Noon and L.M.T of Birth : 12 h 00 m 00 s
(if L.M.T is PM then T.I is L.M.T itself)
(-) step 3 :
Time Interval :
10. Correction for T.I (from Table of Asc, Table no. 4 page 5)
a) for hours :
b) for mins :
for h m (a+b) :
11. The increase in T.I (step 9 + 10) :
12. S.T at the time of Birth (Please see note below) :
From S.T latitude of place, from the Table of Ascendant, to calculate Lagna by interpolation method.
13. For deg North Asc =
For deg North Asc =
For variation =
For deg North Mins Asc =
14. Aynamsa correction (from Table of Ascendant Pg. 6 :
for Birth Year
Note :
a) if T.O.B is AM
S.T = step 8 - step 11
if step 8 is < step 11, then
S.T = (step 8 + 24 hours) - step 11
b) if T.O.B is PM
S.T = step 8 + step 11
c) if S.T > 24 hours then subtract 24 hours from it to get S.T
d)
1) for southern latitude, add 12 hours to the S.T as Modified Sidereal Time (MST).
if M.S.T > 24 hours then subtract 24 hours to get M.S.T
2) for southern latitude, add 6 signs to the Ascendant.
If Ascendant is > 12 signs then subtract 12 signs to get the ascendant.
Example Calculation Sheet
Lagna / Ascendant Calculation
Input : 1. P.O.B : Bangalore
2. T.O.B : 11 hours 54 mins (PM)
3. D.O.B : 25.09.1970
From Lahiri's Indian Ephemeris (page 144 to 158)
Place Longitude : 77 E 36
Place Lattitude : 12 N 58
1. I.S.T of birth (AM / PM) : 11 h 54 m 00 s
2. LMT correction (where the place longitude/lattitude is available : (-) 00 h 19 m 36 s
and next column to longitude)
3. LMT at P.O.B (AM / PM) (step 1 + 2) : 11 h 34 m 24 s
4. S.T at 12 Noon on Birth Date, Birth Month and Birth Year : 12 h 14 m 29 s
for 82 deg 30 mins (from Table of Asc : Table no. 1 pg 2 & 3)
5. Correction for Birth Year : (+) 00 h 00 m 11 s
(From Table of Asc Table no. 11 page 3 & 4)
6. S.T at 12 Noon on Birth Date, Birth Month and Birth Year : 12 h 14 m 40 s
for 82 deg and 30 mins (step 4 + 5)
7. Correction for Place of Birth (where the place longitude / : (+) 00 h 00 m 02 s
lattitude is available and last column)
8. S.T at 12 Noon on Birth Date, Birth Month and Birth Year : 12 h 14 m 42 s
at the Place of Birth (step 6 + 7)
9. Time interval (TI) between 12 Noon and L.M.T of Birth : 12 h 00 m 00 s
(if L.M.T is PM then T.I is L.M.T itself)
(-) step 3 :
Time Interval : 11 h 34 m 24 s
(since TOB is PM)
10. Correction for T.I (from Table of Asc, Table no. 4 page 5)
a) for 11 hours : (+) 00 h 01 m 48 s
b) for mins : (+) 00 h 00 m 06 s
for h m (a+b) : 00 h 01 m 54 s
11. The increase in T.I (step 9 + 10) : 11 h 36 m 18 s
12. S.T at the time of Birth (Please see note below) : 23 h 51 m 00 s
From S.T latitude of place, from the Table of Ascendant, to calculate Lagna by interpolation method.
(Banglaore place latitude : 12 N 58 can be directly looked up in page 20)
13. For 12 deg North Asc = 2 sign 9 deg 47 mins
For 13 deg North Asc = 2 sign 10 deg 12 mins
For variation = 25 mins
Calculation to for 58 mins to get to 12 deg and 58 mins (Bangalore)
1 latitude = 25 mins (from above step 13)
therefore 60 mins = 25 mins
then 58 mins = 22.30 (or 22 mins 18 secs) = 22 mins
For 12 deg North 58 Mins Asc = 2 sign 09 deg 47 mins
(+) 0 sign 00 deg 22 mins
----------------------------
2 sign 10 deg 09 mins
14. Aynamsa correction (from Table of Ascendant Pg. 6 : 2 sign 10 deg 09 mins
for Birth Year 1970 (-) 0 sign 0 deg 27 mins
---------------------------
2 sign 09 deg 42 mins
The Ascendant falls in Gemini at 9 degrees and 42 mins
Note :
a) if T.O.B is AM
S.T = step 8 - step 11
if step 8 is < step 11, then
S.T = (step 8 + 24 hours) - step 11
b) if T.O.B is PM
S.T = step 8 + step 11
c) if S.T > 24 hours then subtract 24 hours from it to get S.T
d)
1) for southern latitude, add 12 hours to the S.T as Modified Sidereal Time (MST).
if M.S.T > 24 hours then subtract 24 hours to get M.S.T
2) for southern latitude, add 6 signs to the Ascendant.
If Ascendant is > 12 signs then subtract 12 signs to get the ascendant.
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Author:
Sheshachalam Iyengar
Jyotish Visharad : iyengarastro@gmail.com
(for online Astrology and Tarot classes contact : +91-7338608070)
Jyotish Visharad : iyengarastro@gmail.com
(for online Astrology and Tarot classes contact : +91-7338608070)
