Example Data Table
| Sidereal Moon Longitude |
Rasi |
Nakshatra |
Pada |
Note |
| 000° 30′ 00″ |
மேஷம் / Mesham |
அஸ்வினி / Ashwini |
1 |
Early zodiac position |
| 035° 00′ 00″ |
ரிஷபம் / Rishabam |
கார்த்திகை / Krittika |
3 |
Inside Taurus section |
| 125° 00′ 00″ |
சிம்மம் / Simmam |
மகம் / Magha |
2 |
Leo Moon example |
| 210° 00′ 00″ |
விருச்சிகம் / Viruchigam |
விசாகம் / Vishakha |
4 |
Near star end |
| 359° 00′ 00″ |
மீனம் / Meenam |
ரேவதி / Revati |
4 |
End of zodiac cycle |
Formula Used
Sidereal Moon Longitude = Tropical Moon Longitude - Ayanamsha.
Rasi Number = floor(Sidereal Moon Longitude / 30) + 1.
Nakshatra Number = floor(Sidereal Moon Longitude / 13°20′) + 1.
Pada = floor(Position inside Nakshatra / 3°20′) + 1.
Balance = Full section size - completed section degree.
The birth detail mode uses a compact Moon longitude equation. It is suitable for general reference. Use a precise ephemeris for formal horoscope preparation.
How To Use This Calculator
Select birth detail mode when you want the tool to estimate the Moon position from date and time.
Enter birth date, birth time, and time zone offset. For India, use 5.5.
Select an ayanamsha. Lahiri approximate is the default option.
Use direct longitude mode when you already know the sidereal Moon longitude.
Press calculate. The result appears above the form and below the header.
Use the CSV or PDF buttons to save the displayed result.
About This Tamil Rasi Nakshatra Tool
This calculator helps you find the Moon based rasi and nakshatra used in Tamil astrology. It can work in two ways. You may enter a known sidereal Moon longitude. You may also enter birth date, birth time, and time zone. The second method uses a compact astronomical estimate. It is useful for study, content pages, and quick checks.
Why Rasi And Nakshatra Matter
Rasi is the zodiac sign occupied by the Moon. Each rasi covers thirty degrees. Nakshatra divides the same sky path into twenty seven star sectors. Each sector covers thirteen degrees and twenty minutes. Every nakshatra also has four padas. Each pada covers three degrees and twenty minutes.
Tamil Astrology Reference
Tamil panchangam practice often uses nakshatra for naming letters, daily star matching, muhurtham notes, and simple horoscope references. Rasi is also used for transit reading and monthly forecasts. This page shows Tamil names with common English transliteration. It also displays ruling planet, deity, gana, animal sign, and syllable for the calculated pada.
Accuracy Notes
The direct longitude mode gives the cleanest result when you already have a trusted Moon longitude. The birth detail mode is approximate. It uses a simplified Moon longitude equation and an approximate ayanamsha. It should not replace a professional ephemeris for final horoscope work. Small differences can change the result near nakshatra borders.
Best Use
Use the result as an educational guide. Check the degree, rasi balance, nakshatra balance, and pada. Export the result as CSV or PDF for records. Compare the example table to understand how degrees map to star divisions.
Reading The Result
The report begins with the sidereal Moon degree. It then shows the rasi and the exact position inside that rasi. The nakshatra line shows the star name and its pada. The balance lines show how much of the current rasi and nakshatra remains. These values help readers see whether the Moon is near the start, middle, or end of a section.
Input Tips
Use twenty four hour time for birth entries. Select the correct time zone offset. Enter longitude mode when another panchangam has already supplied the Moon degree. Use decimal degrees for entry, or enter degrees, minutes, and seconds for work.
FAQs
What is rasi?
Rasi is the zodiac sign where the Moon is placed. Tamil astrology uses it for horoscope reading, transit notes, and monthly star based references.
What is nakshatra?
Nakshatra is a lunar star division. There are twenty seven nakshatras. Each one covers thirteen degrees and twenty minutes of the zodiac.
What is pada?
Pada is one quarter of a nakshatra. Each nakshatra has four padas. Each pada covers three degrees and twenty minutes.
Which input mode is better?
Use direct longitude mode when you have a trusted sidereal Moon degree. Use birth detail mode for a quick approximate calculation.
Is this exact for horoscope matching?
No. The birth detail method is approximate. Professional horoscope work should use verified ephemeris data and correct birth records.
Why is ayanamsha needed?
Ayanamsha converts tropical longitude into sidereal longitude. Tamil astrology generally uses sidereal zodiac positions for rasi and nakshatra.
Can I use Indian time?
Yes. Enter 5.5 as the time zone offset for Indian Standard Time. Also enter the birth date and birth time carefully.
Why do borders matter?
Small Moon degree differences can change nakshatra or pada near borders. Always verify close results with a precise panchangam.