Find Rasi And Nakshatra Calculator

Find Your Rasi & Nakshatra

Enter your birth details to find your Rasi (Moon Sign) and Nakshatra (Birth Star) according to Vedic astrology.

The 27 Nakshatras

Table of the 27 Nakshatras with their sidereal degree spans and ruling planets.

#	Nakshatra	Degrees (Sidereal)	Ruler
1	Ashwini	0°00′ – 13°20′	Ketu
2	Bharani	13°20′ – 26°40′	Venus
3	Krittika	26°40′ – 40°00′	Sun
4	Rohini	40°00′ – 53°20′	Moon
5	Mrigashira	53°20′ – 66°40′	Mars
6	Ardra	66°40′ – 80°00′	Rahu
7	Punarvasu	80°00′ – 93°20′	Jupiter
8	Pushya	93°20′ – 106°40′	Saturn
9	Ashlesha	106°40′ – 120°00′	Mercury
10	Magha	120°00′ – 133°20′	Ketu
11	Purva Phalguni	133°20′ – 146°40′	Venus
12	Uttara Phalguni	146°40′ – 160°00′	Sun
13	Hasta	160°00′ – 173°20′	Moon
14	Chitra	173°20′ – 186°40′	Mars
15	Swati	186°40′ – 200°00′	Rahu
16	Vishakha	200°00′ – 213°20′	Jupiter
17	Anuradha	213°20′ – 226°40′	Saturn
18	Jyeshtha	226°40′ – 240°00′	Mercury
19	Mula	240°00′ – 253°20′	Ketu
20	Purva Ashadha	253°20′ – 266°40′	Venus
21	Uttara Ashadha	266°40′ – 280°00′	Sun
22	Shravana	280°00′ – 293°20′	Moon
23	Dhanishtha	293°20′ – 306°40′	Mars
24	Shatabhisha	306°40′ – 320°00′	Rahu
25	Purva Bhadrapada	320°00′ – 333°20′	Jupiter
26	Uttara Bhadrapada	333°20′ – 346°40′	Saturn
27	Revati	346°40′ – 360°00′	Mercury

What is a Rasi and Nakshatra Calculator?

A Rasi and Nakshatra calculator is a tool used in Vedic astrology to determine two fundamental elements of a person’s birth chart: their Rasi (Moon Sign) and Nakshatra (Birth Star or Lunar Mansion). These are calculated based on the precise position of the Moon in the zodiac at the moment of a person’s birth.

The Rasi is the zodiac sign (out of the 12 signs like Aries, Taurus, etc.) where the Moon was placed at the time of birth, according to the sidereal zodiac used in Vedic astrology. The Nakshatra is a smaller division of the zodiac; there are 27 Nakshatras, each spanning 13 degrees and 20 minutes. The Moon’s position within one of these Nakshatras at birth gives the birth Nakshatra.

This Rasi and Nakshatra calculator uses your birth date, time, and timezone to calculate the Moon’s sidereal longitude and then determines your Rasi and Nakshatra.

Who Should Use It?

Anyone interested in Vedic astrology, understanding their personality traits as per their Moon sign and birth star, or looking for auspicious timings based on their Nakshatra can use this Rasi and Nakshatra calculator. It’s often the first step in getting a Vedic astrology reading.

Common Misconceptions

• Rasi is the same as the Western Sun Sign: False. Rasi is based on the Moon’s position in the sidereal zodiac, while the Western Sun Sign is based on the Sun’s position in the tropical zodiac. They are usually different.
• Nakshatras are just subdivisions of Rasis: While Nakshatras are within the zodiac band and thus overlap with Rasis, they offer a much more detailed and nuanced layer of interpretation than Rasis alone.
• You only need the date of birth: To accurately find Rasi and Nakshatra, the time of birth and, ideally, place of birth (for timezone) are crucial because the Moon moves relatively fast.

Rasi and Nakshatra Formula and Mathematical Explanation

The calculation of Rasi and Nakshatra involves several steps:

1. Convert Birth Time to Julian Day (JD): The birth date and time, adjusted for the timezone, are converted into a Julian Day number, which is a continuous count of days since a remote epoch.
2. Calculate Moon’s Tropical Longitude: Using astronomical formulas, the Moon’s position (longitude) in the tropical zodiac is calculated for the given Julian Day. This involves calculating the Moon’s mean longitude, mean anomaly, and applying corrections for perturbations like evection and the annual equation based on the Sun’s position.
3. Calculate Ayanamsha: The Ayanamsha is the difference between the tropical (season-based) and sidereal (star-based) zodiacs due to the precession of the equinoxes. The Lahiri Ayanamsha is commonly used in Indian astrology, and its value is calculated for the birth date.
4. Calculate Moon’s Sidereal Longitude: Sidereal Longitude = Tropical Longitude – Ayanamsha. The result is normalized to be within 0 and 360 degrees.
5. Determine Nakshatra: The sidereal zodiac is divided into 27 Nakshatras, each spanning 13° 20′ (or 800 arc minutes). The Moon’s sidereal longitude is used to find which Nakshatra it falls into. (Longitude / 13.3333 gives an index). Each Nakshatra is further divided into 4 Padas (quarters), each 3° 20′ (200 arc minutes).
6. Determine Rasi: The sidereal zodiac is also divided into 12 Rasis, each spanning 30°. The Moon’s sidereal longitude is used to find which Rasi it falls into (Longitude / 30 gives an index).

The formula for Moon’s sidereal longitude is:
Moon Sidereal Longitude = (Moon Tropical Longitude - Ayanamsha) mod 360

Our Rasi and Nakshatra calculator uses simplified astronomical formulas to estimate the Moon’s position and Lahiri Ayanamsha.

Variables Table

Variables used in the Rasi and Nakshatra calculation.

Variable	Meaning	Unit	Typical Range
Birth Date/Time	The moment of birth	Date & Time	–
Timezone Offset	Offset from UTC	Hours	-12 to +14
Julian Day (JD)	Days since Jan 1, 4713 BC, 12:00 UT	Days	> 2400000
Moon’s Tropical Longitude	Moon’s position in tropical zodiac	Degrees	0-360
Ayanamsha	Precessional difference	Degrees	~23-24 (for current era, Lahiri)
Moon’s Sidereal Longitude	Moon’s position in sidereal zodiac	Degrees	0-360
Nakshatra Number	Index of the birth star (1-27)	–	1-27
Pada	Quarter of the Nakshatra (1-4)	–	1-4
Rasi Number	Index of the Moon sign (1-12)	–	1-12

Practical Examples (Real-World Use Cases)

Example 1:

Someone born on January 15, 2000, at 10:00 AM in a location with a +5.5 timezone offset (like India).

• Inputs: Day=15, Month=1, Year=2000, Hour=10, Minute=0, Timezone=+5.5
• The Rasi and Nakshatra calculator processes these inputs.
• It might find the Moon’s sidereal longitude to be around 100 degrees.
• Output: Rasi: Karka (Cancer), Nakshatra: Pushya, Pada: 1, Moon Longitude: ~100°
• Interpretation: The person’s Moon sign is Cancer, and their birth star is Pushya, first pada. This suggests certain personality traits associated with Cancer and Pushya.

Example 2:

Someone born on July 20, 1995, at 8:30 PM (20:30) in a location with a -4 timezone offset (like US East Coast during EDT).

• Inputs: Day=20, Month=7, Year=1995, Hour=20, Minute=30, Timezone=-4
• The Rasi and Nakshatra calculator calculates the Moon’s position.
• Suppose the Moon’s sidereal longitude is found to be 245 degrees.
• Output: Rasi: Dhanu (Sagittarius), Nakshatra: Mula, Pada: 2, Moon Longitude: ~245°
• Interpretation: The individual’s Moon sign is Sagittarius, and birth star Mula, second pada.

How to Use This Rasi and Nakshatra Calculator

1. Enter Birth Date: Input the day (1-31), select the month, and enter the year (YYYY) of birth.
2. Enter Birth Time: Input the hour (0-23) and minute (0-59) of birth in 24-hour format.
3. Enter Timezone Offset: Input the timezone offset from UTC in hours (e.g., 5.5 for India, -5 for EST, -4 for EDT). Use positive for East of UTC, negative for West.
4. Calculate: Click the “Calculate” button (or the results update automatically as you type if implemented that way).
5. Read Results: The calculator will display your Rasi (Moon Sign), Nakshatra (Birth Star), and Pada (quarter of the Nakshatra), along with the Moon’s calculated sidereal longitude.

The results from our Rasi and Nakshatra calculator give you your primary Vedic astrological placements based on the Moon, which are considered very important in Vedic astrology for understanding one’s mind, emotions, and general destiny.

Key Factors That Affect Rasi and Nakshatra Results

• Date of Birth: This determines the general position of planets but needs time for precision.
• Time of Birth: Crucial for the Moon’s position as it moves about 12-13 degrees per day. An error of a few minutes can change the Pada or even the Nakshatra if the Moon is near a boundary.
• Timezone/Place of Birth: This converts the local birth time to UTC, which is used in astronomical calculations. Incorrect timezone leads to incorrect Moon position. While we ask for timezone offset directly, it is derived from the place of birth and the date (due to daylight saving).
• Ayanamsha Used: Different Ayanamshas (e.g., Lahiri, Raman, KP) will give slightly different sidereal longitudes, potentially changing the Rasi or Nakshatra if the Moon is near a cusp. This calculator uses Lahiri Ayanamsha.
• Accuracy of Astronomical Formulas: The precision of the formulas used to calculate the Moon’s longitude affects the result. Highly precise formulas are complex. This calculator uses simplified formulas for reasonable web-based accuracy.
• Leap Years and Time Corrections: These are handled by converting to Julian Day, which accounts for leap years.

Frequently Asked Questions (FAQ)

What is Rasi?

Rasi is the Moon sign, the zodiac sign in which the Moon was present at the time of your birth, according to the sidereal zodiac used in Vedic astrology.

What is Nakshatra?

Nakshatra is a lunar mansion or birth star. The zodiac is divided into 27 Nakshatras, and the one occupied by the Moon at birth is your Nakshatra.

Why is my Rasi different from my Western Sun sign?

Rasi is based on the Moon’s position in the sidereal zodiac, while the Western Sun sign is based on the Sun’s position in the tropical zodiac. The zodiac systems and the celestial body considered are different.

How accurate is this Rasi and Nakshatra calculator?

This calculator uses standard simplified astronomical algorithms and the Lahiri Ayanamsha. It provides a good estimate suitable for general purposes. For very precise calculations or if born near a cusp, consulting a professional astrologer with specialized software might be beneficial.

What if I don’t know my exact time of birth?

The Moon changes Nakshatra roughly every day and Pada every 6 hours. If you don’t know the exact time, the Rasi might still be correct if the Moon was not near a Rasi boundary, but the Nakshatra or Pada could be different. Try with an approximate time, but be aware of the uncertainty.

What is Pada?

Each Nakshatra is divided into four Padas (quarters), each spanning 3° 20′. The Pada provides a more refined classification within the Nakshatra.

Does the place of birth matter?

Yes, the place of birth is used to determine the correct local time and timezone offset from UTC at the moment of birth. Our calculator asks for the timezone offset directly.

Which Ayanamsha does this calculator use?

This Rasi and Nakshatra calculator uses the Lahiri Ayanamsha, which is widely used in India.

Related Tools and Internal Resources

• Free Birth Chart Calculator: Generate a more detailed Vedic birth chart.
• Today’s Panchangam: Check the daily Vedic calendar elements.
• Numerology Calculator: Find your life path and destiny numbers.
• Astrology Compatibility Calculator: Check compatibility based on Vedic principles.
• Kundali Matching: Detailed marriage compatibility analysis.
• Gemstone Recommendation: Find lucky gemstones based on your chart.

Using a Rasi and Nakshatra calculator is a great starting point for exploring Vedic astrology.