Guest guest Posted July 12, 2007 Report Share Posted July 12, 2007 Dear Su, Singapore, formerly part of Malaya, became independent in 1965. Singapore adopted the S.T. Meridian 120E00 (8:00) in 1981. If we're using computer software to calculate the charts, all that's needed is the correct place and time of birth. Most softwares locate the T.Z. and perform the (other) necessary calculations automatically. However, if one is calculating charts by hand, a good reference Atlas should give all the relevant T.Z. information. I still fall back on the 'Doris Chase Doane' Time Changes Books, although they've been superseded by Thomas Shanks American Atlas (so I'm told?)... Best Wishes, Mrs. Wendy http://JyotishVidya.com jyotish-vidya ___ - " vreality_au " <reality_v <jyotish-vidya > Thursday, July 12, 2007 8:58 PM Re: TZ -Malaysia, (msg 6248) Dear Bhaskar Below is the reply I received re my inquiry about TZ for Malaysia/Singapore Regards Su ========================================== Local Mean Time [LMT] calculation 24 hours is equivalent to 360 ° of longitude or 1 hr to 15 ° of longitude. A country's standard time is with reference to a particular longitude, e.g Malaysian Standard Time which is presently [since 1 Jan. 1982] +8 hrs GMT is with reference to the 120 ° longitude [15 ° ´ 8]. So K.L. which is at 101 °43'E has a GMT of 101 °43' / 15 = +6 hrs 47 min Hence, any birth time recorded in K.L. will have to be corrected by subtracting [because the longitude is less than the reference longitude, 120 °] the difference , 8 hrs - 6 hrs 47 min = 1 hr 13 min , to obtain the LMT. Thus a birth time of 4.27 am, K.L . will have a LMT of 4.27 - 1.13 = 3.14 am If the longitude of a place is more than the reference longitude than we add the difference of the GMT's. e.g. If there is a place [in Malaysia] with longitude 122 ° 36', then it will have a GMT of 122 ° 36'/15 = + 8 hrs 10 min. So all birth times in this place have to be corrected by adding [because the longitude is more than the reference longitude, 120 °] the difference, 8 hrs 10 mins - 8 hrs = 10 mins to obtain the LMT. Thus a birth time of 10.56 pm will have a LMT of 10.56 + 10 = 11.06 pm -John Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 13, 2007 Report Share Posted July 13, 2007 PS: Instructions for those interested in knowing how to (manually) calculate Lagna: 1) Before you start your calculations, the date, time and place of birth are required. You should also have available an ephemeris for the year of birth, a table of ascendants and an atlas or reference book for the longitude, latitude and time-zone of the birthplace. 2) Look in the reference book and find out if the person was born during daylight-saving time (summer or war time). Usually daylight-saving time is one hour, but occasionally double daylight-saving existed, which is equal to two hours. Subtract daylight-saving time from the birth time. 3) Look in the reference book and find out the time-zone for the birthplace on the date of birth. Subtract the time-zone from the birthtime if east of Greenwich; add to the birthtime if west. The result is Greenwich Mean Time (GMT). NOTE: If zonal time was not yet introduced in the country then proceed in the following way: Note the Standard Time Meridian (i.e., the longitude of the place, of which the time was used for the birthplace) and divide by 15. The result when changed into hours, minutes and seconds represents the time-zone of the birthplace. 4) Look up the longitude of the birthplace in the atlas or reference book. If it is different from 0 degrees, you must adjust the birth time. Each degree of longitude is equal to 4 minutes (i.e., multiply the longitude by 4 and change the result into hours, minutes and seconds). If the birthplace is east of Greenwich, add this result to GMT; if west, then subtract. The result is Local Mean Time. 5) Look in the ephemeris for the correct sidereal time of the day of birth and add this number to the Local Mean Time. 6) The sidereal time in the ephemeris is given for 0 hr GMT. If the GMT of birth which you have calculated (in step 3 above) is different from 0 hr, you must adjust the sidereal time. For every one hour of GMT, add 9.86 seconds. Add up Local Mean Time plus sidereal time of the day plus its adjustment to get the sidereal time of birth. 7) If the latitude of the birthplace is south of the equator, add 12 hrs to the sidereal time of birth. If the result is greater than 24 hrs, deduct 24 hrs; if smaller than 0, add 24 hrs. The result is the adjusted sidereal time of birth. 8) Look up the latitude of the birthplace in the atlas or reference book. Then look in the table of ascendants for the sidereal time of birth. Locate the row with the respective latitude of the birthplace. The value given is the Sayana Lagna (tropical ascendent). If the latitude of the birthplace is south of the equator, adjust the result by 180 degrees, i.e., add or subtract 6 signs. 9) If the exact latitude is not given , you must interpolate between the two values nearest the latitude of the birthplace to find the exact value for the ascendent. If the exact sidereal time of birth is not given in the table of ascendants, you must interpolate between the next lower and higher sidereal time given in the table of ascendants, i.e., find the ascendent for the intermediary value. 10) Look in the ephemeris or reference table and find the Ayanamsha for the date of birth. Deduct the Ayanamsha from the Sayana Lagna to get the Nirayana Lagna (sidereal ascendent). Best Wishes, Mrs. Wendy http://JyotishVidya.com jyotish-vidya ___ - " Wendy Vasicek " <jyotish <jyotish-vidya > Friday, July 13, 2007 2:04 AM Re: Re: TZ -Malaysia, (msg 6248) Dear Su, Singapore, formerly part of Malaya, became independent in 1965. Singapore adopted the S.T. Meridian 120E00 (8:00) in 1981. If we're using computer software to calculate the charts, all that's needed is the correct place and time of birth. Most softwares locate the T.Z. and perform the (other) necessary calculations automatically. However, if one is calculating charts by hand, a good reference Atlas should give all the relevant T.Z. information. I still fall back on the 'Doris Chase Doane' Time Changes Books, although they've been superseded by Thomas Shanks American Atlas (so I'm told?)... Best Wishes, Mrs. Wendy http://JyotishVidya.com jyotish-vidya ___ Quote Link to comment Share on other sites More sharing options...
Guest guest Posted July 13, 2007 Report Share Posted July 13, 2007 Great post Wendyji!! Thanks for the clarification and instruction! Regards Su > " Wendy Vasicek " <jyotish >jyotish-vidya ><jyotish-vidya > >Re: Re: TZ -Malaysia, (msg 6248) >Fri, 13 Jul 2007 14:42:21 +0800 > >PS: Instructions for those interested in knowing how to (manually) >calculate >Lagna: > >1) Before you start your calculations, the date, time and place of birth >are >required. You should also have available an ephemeris for the year of >birth, >a table of ascendants and an atlas or reference book for the longitude, >latitude and time-zone of the birthplace. > >2) Look in the reference book and find out if the person was born during >daylight-saving time (summer or war time). Usually daylight-saving time is >one hour, but occasionally double daylight-saving existed, which is equal >to >two hours. Subtract daylight-saving time from the birth time. > >3) Look in the reference book and find out the time-zone for the birthplace >on the date of birth. Subtract the time-zone from the birthtime if east of >Greenwich; add to the birthtime if west. The result is Greenwich Mean Time >(GMT). > >NOTE: If zonal time was not yet introduced in the country then proceed in >the following way: >Note the Standard Time Meridian (i.e., the longitude of the place, of which >the time was used for the birthplace) and divide by 15. The result when >changed into hours, minutes and seconds represents the time-zone of the >birthplace. > >4) Look up the longitude of the birthplace in the atlas or reference book. >If it is different from 0 degrees, you must adjust the birth time. Each >degree of longitude is equal to 4 minutes (i.e., multiply the longitude by >4 >and change the result into hours, minutes and seconds). If the birthplace >is >east of Greenwich, add this result to GMT; if west, then subtract. The >result is Local Mean Time. > >5) Look in the ephemeris for the correct sidereal time of the day of birth >and add this number to the Local Mean Time. > >6) The sidereal time in the ephemeris is given for 0 hr GMT. If the GMT of >birth which you have calculated (in step 3 above) is different from 0 hr, >you must adjust the sidereal time. For every one hour of GMT, add 9.86 >seconds. Add up Local Mean Time plus sidereal time of the day plus its >adjustment to get the sidereal time of birth. > >7) If the latitude of the birthplace is south of the equator, add 12 hrs to >the sidereal time of birth. If the result is greater than 24 hrs, deduct 24 >hrs; if smaller than 0, add 24 hrs. The result is the adjusted sidereal >time >of birth. > >8) Look up the latitude of the birthplace in the atlas or reference book. >Then look in the table of ascendants for the sidereal time of birth. Locate >the row with the respective latitude of the birthplace. The value given is >the Sayana Lagna (tropical ascendent). If the latitude of the birthplace is >south of the equator, adjust the result by 180 degrees, i.e., add or >subtract 6 signs. > >9) If the exact latitude is not given , you must interpolate between the >two >values nearest the latitude of the birthplace to find the exact value for >the ascendent. If the exact sidereal time of birth is not given in the >table >of ascendants, you must interpolate between the next lower and higher >sidereal time given in the table of ascendants, i.e., find the ascendent >for >the intermediary value. > >10) Look in the ephemeris or reference table and find the Ayanamsha for the >date of birth. Deduct the Ayanamsha from the Sayana Lagna to get the >Nirayana Lagna (sidereal ascendent). > >Best Wishes, >Mrs. Wendy >http://JyotishVidya.com >jyotish-vidya >___ > > >- > " Wendy Vasicek " <jyotish ><jyotish-vidya > >Friday, July 13, 2007 2:04 AM >Re: Re: TZ -Malaysia, (msg 6248) > > >Dear Su, > >Singapore, formerly part of Malaya, became independent in 1965. >Singapore adopted the S.T. Meridian 120E00 (8:00) in 1981. > >If we're using computer software to calculate the charts, all that's needed >is the correct place and time of birth. Most softwares locate the T.Z. and >perform the (other) necessary calculations automatically. >However, if one is calculating charts by hand, a good reference Atlas >should >give all the relevant T.Z. information. I still fall back on the 'Doris >Chase Doane' Time Changes Books, although they've been superseded by Thomas >Shanks American Atlas (so I'm told?)... > >Best Wishes, >Mrs. Wendy >http://JyotishVidya.com >jyotish-vidya >___ > > > _______________ Movie session times on Messenger - add Movie Scout today! http://ninemsn.com.au/share/redir/adTrack.asp?mode=click & clientID=785 & referral=h\ otmailtagline0707 & URL=http://www.yourmovies.com.au/messenger/signup/ Quote Link to comment Share on other sites More sharing options...
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