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Birth Time Rectification

Birth Time Rectification (BTR) using Ruling Planets (RP) method

Note the Ruling Planets at the time of judgment (the time when astrologer has taken up, or commenced, the rectification of birth chart). Ruling planets are -
1. Day lord (DL)
2. Moon Sign lord (MSL)
3. Moon Nakshatra lord (MNL)
4. Ascendant Sign lord (ASL)
5. Ascendant Nakshatra lord (ANL)

These five ruling planets should be among Ascendant Sign Lord, Ascendant Nakshatra Lord and Ascendant Sub lord in the birth chart of the native. If the Ruling Planets at the time of judgment are not matching with the Ascendant Sign Lord, Ascendant Nakshatra Lord, and Ascendant Sub lord in native's birth chart, it means the birth time provided to the astrologer is not correct and requires rectification. 

The Day Lord is taken as per Hindu day system which starts from Sunrise and ends on the next sunrise. It is NOT calculated from 12 O’Clock Midnight to next 12 O’Clock midnight. For example if somebody born on February 11, 2011 at 4:00 AM at Agra, UP, INDIA, it will be Thursday and NOT Friday because 4:00 AM is before sunrise on February 11, 2011. 

If Rahu or Ketu are acting as an agent to any of the ruling planets at the time of judgment, those will also be included as ruling planet. For example, if any node (Rahu or Ketu) is in conjunction or receiving aspect from any of the ruling planets, or if it occupies the sign owned by the ruling planet, the node should be included in list of the ruling planets.

In case we need less ruling planets, ruling planets that are in the star or sub of retrograde planets, can be omitted. 

Among the ruling planets, Ascendant Nakshatra Lord, Ascendant Sign lord, Moon's Nakshatra Lord, Moon's Sign lord and the Day Lord are taken in order of strength i.e. Ascendant Nakshatra Lord is the most powerful ruling planet and Day lord is the least powerful. This strength is useful when we have to select few among all the ruling planets.