Yoga Calculation Method: 27 Special Moments from the Union of Sun and Moon

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On the pages of the Panchang, alongside Tithi, Vaar, Nakshatra, and Karana, there is another important limb — Yoga. It is not as familiar as Tithi or Nakshatra, but in astrological philosophy the significance of Yoga is immense. For Yoga is the sum of the longitudes of the Sun and the Moon — it points to that particular moment of time which influences the stability of an action and its final outcome. The ancient sages discovered that from the union of the Sun and the Moon — these two luminaries — is born the deepest mystery of time. The name of that mystery is Yoga.

If you analyse a natal chart or a horoscope through Kundli making, the correct calculation of Yoga is extremely important. The scriptures say that an action begun in a specific Yoga creates the potential for a specific outcome. For instance, starting work in 'Vishkumbha' Yoga carries the risk of obstruction, while starting in 'Shubha' Yoga increases the likelihood of success. Marriage, house-entry, business initiation — in determining the muhurat of almost all auspicious acts, special attention is paid to the Yoga.

Today we shall learn what Yoga really is, how it is calculated, the names and natures of the 27 Yogas, and the importance of Yoga in astrology — all in simple English, in the language of astrological philosophy.

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What Is Yoga? The Definition in Astrological Philosophy

Yoga is the specific moment determined by the integer part of the quotient obtained by dividing the sum of the Sun's and the Moon's longitudes by 13°20′ (that is, 800 arcminutes).

From the sum of the Sun's and Moon's longitudes, Yoga is created — and there are 27 Yogas in all.

In muhurat analysis, Yoga indicates the nature of an action begun at a specific moment — whether it will be fruitful or obstructed, stable or changeable. Yoga gives an indication of the ultimate outcome of an action.

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The Complete List of 27 Yogas and Their Natures

Dividing the sum of the Sun's and Moon's longitudes by 13°20′ (800 arcminutes) yields 27 divisions. Each division has a name and a specific nature.

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The Scriptural Method of Yoga Calculation

Basic Formula

The Surya Siddhanta (Spashtadhikara) gives the rule for Yoga calculation — dividing the sum of the Sun's and Moon's longitudes by the nakshatra measure (800 kala).

Yoga serial number = ⌊(Sun longitude + Moon longitude) ÷ 13°20′⌋ + 1

13°20′ = 13×60 + 20 = 800 arcminutes

Here the ⌊ ⌋ symbol denotes the floor function — that is, take the integer part of the quotient and discard the decimal part. The Yoga is determined by the integer part of the quotient, not the remainder.

Step-by-Step Calculation

Step 1: Find the Sun's longitude and the Moon's longitude (from 0° to 360°).

Step 2: Sum them. If the sum exceeds 360°, subtract 360°.

Step 3: Divide the sum by 13°20′ (that is, 13.333° or 800 arcminutes).

Step 4: Take the integer part of the quotient (floor) — discard the digits after the decimal.

Step 5: Add 1 to the number obtained. The result is the serial number of the Yoga (from 1 to 27).

Step 6: Identify the Yoga of that serial number from the list above.

Example 1: A Simple Calculation

Suppose the Sun's longitude is 70° and the Moon's longitude is 200° —

• Sum = 70° + 200° = 270°
• 270 ÷ 13.333 = 20.25
• Integer part (floor) = 20
• 20 + 1 = 21
• Serial number 21 = Siddha Yoga

Example 2: When the Sum Exceeds 360°

Suppose the Sun's longitude is 350° and the Moon's longitude is 30° —

• Sum = 350° + 30° = 380°
• 380° – 360° = 20° (one full cycle completed)
• 20 ÷ 13.333 = 1.5
• Integer part (floor) = 1
• 1 + 1 = 2
• Serial number 2 = Preeti Yoga

Example 3: A Boundary Case — Important

Suppose the sum is exactly 13°20′ (that is, 800 arcminutes) —

• 13°20′ ÷ 13°20′ = 1
• Integer part (floor) = 1
• 1 + 1 = 2
• Serial number 2 = Preeti Yoga

📌 Boundary rule: When the quotient is a whole number (that is, the sum is exactly 13°20′, 26°40′, etc.), the next Yoga begins. That is, the boundary point counts as the new Yoga. The 13°20′ point does not belong to Vishkumbha; it is the beginning of Preeti.

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Daily Yoga and Running Yoga: An Important Distinction

A Panchang mentions two kinds of Yoga — the Daily Yoga and the Running Yoga. Understanding the difference between them is important.

Daily Yoga

The Yoga present at sunrise is called the 'Daily Yoga'. The page of a Panchang usually states this Yoga. It is a reference point for the whole day.

Running Yoga

Yoga changes during the day. The Yoga running at a specific time is the 'Running Yoga'. In determining an auspicious muhurat, the running Yoga must be considered.

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Practical Applications of Yoga

1. The Role of Yoga in Auspicious Acts

The role of Yoga in astrology is extremely important. Performing a specific act in a specific Yoga creates the potential for a favourable outcome. But this is not the sole decisive factor — the positions of the planets, the tithi, the nakshatra, the lagna, the karana — all are considered together to determine an auspicious muhurat. In a natal chart or Kundli making, this very synthesis helps an astrologer determine the right muhurat.

2. Inauspicious Yogas: Vaidhriti and Vyatipata

The Muhurta Chintamani (Shubhashubha Prakarana) tells us to always avoid certain Yogas in auspicious work — Vyatipata and Vaidhriti for their entire duration, and the first few ghatis of Vishkumbha and Vajra Yogas. Therefore, for acts such as marriage, house-entry, or business initiation, Vyatipata and Vaidhriti are entirely avoided.

3. Auspicious Yogas: Shubha and Siddhi

Shubha Yoga and Siddhi Yoga are of an extremely auspicious nature. For marriage, house-entry, business initiation — for any auspicious act — these Yogas are highly favourable. Shubha Yoga generally favours all kinds of auspicious acts. Siddhi Yoga carries a greater potential for the fulfilment of desires and the attainment of success.

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The Philosophical Perspective on Yoga

Modern authors who align the five limbs of the Panchang with the five elements — depending on the author, Yoga is matched with either the earth or the ether. In muhurat analysis, the function of Yoga is to indicate what the nature of an action begun at a specific moment will be. It gives information about the ultimate outcome of the action.

In muhurat analysis, Yoga indicates the outcome — stability or change, success or obstruction. Through Yoga we can know the nature of an action begun at a specific moment — whether stable or fickle, successful or obstructed.

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Information Required for Yoga Calculation

The following information is required for Yoga calculation —

1. The Longitudes of the Sun and the Moon Yoga calculation requires the longitudes of the Sun and the Moon. This information is obtained from —

• Mathematical texts such as the Surya Siddhanta
• Modern astrological software
• A reliable Panchang

2. The Time of Sunrise For Yoga calculation, knowing the local sunrise time is essential.

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Conclusion: Yoga — the Indicator of the Fruit of Action

The method of Yoga calculation is not merely an astronomical computation. It is a marvellous illustration of ancient Indian astrological philosophy — where, through the union of the Sun and the Moon, information about the potential outcome of an action is obtained. Beginning in an auspicious Yoga increases the likelihood of success; beginning in an inauspicious Yoga carries the risk of obstruction — this subtle observation testifies to the extraordinary knowledge of the ancient sages.

"Know the Yoga, know the potential of your action —
in the auspicious, begin the good; in the inauspicious, remain cautious."

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❓ Frequently Asked Questions (FAQ)

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📖 Conclusion of the Panchang Series

Today we learned the method of Yoga calculation — from the scriptural viewpoint. The five limbs of the Panchang — Vaar, Tithi, Nakshatra, Yoga, and Karana — each have their own importance. In a natal chart or Kundli making, it is the synthesis of this Panchang that gives the right result. In horoscope analysis, the role of Yoga is immense.