What is a nakshatra? The 27 birth stars behind your score

Someone at a wedding asks, "What's your nakshatra?" Most of us can answer with a Moon sign, or a Sun sign from the back page of a magazine. The nakshatra is the one we ring home for. Yet in Kundali matching it does more of the work than the sign. Of the 36 points in an Ashtakoota score, 21 rest on the two birth stars, yours and theirs. Here is what a nakshatra is, how it is found, and what it decides.

The Moon's path, cut into 27

The Moon goes round the whole sky in about 27 days. Vedic astrology divides that path into 27 equal parts, each 13 degrees and 20 minutes wide, and gives each one a name. Those are the nakshatras. Each is marked by a star or a small group of stars, which is why your family calls it your birth star.

The Moon spends roughly a day in each one. Whichever it was passing through at the moment you were born is your janma nakshatra, your birth star. It never changes. In order, the 27 are:

1. Ashwini
2. Bharani
3. Krittika
4. Rohini
5. Mrigashira
6. Ardra
7. Punarvasu
8. Pushya
9. Ashlesha
10. Magha
11. Purva Phalguni
12. Uttara Phalguni
13. Hasta
14. Chitra
15. Swati
16. Vishakha
17. Anuradha
18. Jyeshtha
19. Mula
20. Purva Ashadha
21. Uttara Ashadha
22. Shravana
23. Dhanishtha
24. Shatabhisha
25. Purva Bhadrapada
26. Uttara Bhadrapada
27. Revati

Each nakshatra is split again into four quarters called padas, 3 degrees 20 minutes each. Some families still pick the first letter of a baby's name from the pada. The pada carries no points of its own, though. The 36 points read your Moon sign and your nakshatra, nothing finer than that.

A nakshatra is not a Moon sign

The sky has 12 Moon signs and 27 nakshatras, so the two do not line up. Each sign holds two and a quarter nakshatras, nine padas in all. Two people can share a Moon sign and have different birth stars. Some stars sit across two signs: Krittika starts in Aries and finishes in Taurus, and its pada tells you which side you fall on.

Both are read from the Moon, not the Sun. That is the first thing that surprises people who grew up with Western horoscopes, and it is why your Vedic sign is often not the one you expected. There is a whole post on that: Moon sign vs Sun sign: why Kundali matching uses your Moon.

For now, keep the two apart in your head. The sign is a 30-degree slice of the sky. The nakshatra is a finer slice, 13 degrees 20 minutes. Kundali matching uses both, and gives the finer one more weight.

What your nakshatra decides: 21 of the 36 points

Ashtakoota has eight checks, called kootas. Four of them read the Moon sign: Varna (1 point), Vashya (2), Graha Maitri (5) and Bhakoot (7). That is 15 points. The other four read the nakshatra: Tara (3), Yoni (4), Gana (6) and Nadi (8). That is 21 points, and it includes the heaviest check of all. If you want the full eight explained, start with What is Ashtakoota Milan? Here is the nakshatra half.

Tara, 3 points: luck as a pair

Count from your star to theirs, then from theirs back to yours. Each count is divided by nine, and three of the nine possible remainders (3, 5 and 7) are read as unlucky. If neither direction lands on one of them, the pair gets all 3 points. If one direction does, 1 point. If both do, 0.

Yoni, 4 points: chemistry

Each nakshatra is linked to an animal, 14 in all: horse, elephant, sheep, serpent, dog, cat, rat, cow, buffalo, tiger, hare, monkey, mongoose and lion. The same animal scores 4. Friendly animals score 3, neutral ones 2, unfriendly ones 1. A few pairs are sworn enemies and score 0, such as cat and rat, or cow and tiger. Our website sums it up as "Chemistry. Yes, that kind."

Gana, 6 points: temperament

Every nakshatra belongs to one of three Ganas: Deva, Manushya or Rakshasa. Angel, human, or a little demon, as our website puts it. Rakshasa does not mean wicked here. Tradition reads it as the strong-willed, intense type. The same Gana scores 6. Deva with Manushya scores 5. Deva with Rakshasa scores 1. Manushya with Rakshasa scores 0. This check is about whether two tempers can live in one house.

Nadi, 8 points: the big one

Every birth star belongs to one of three Nadis: Aadi, Madhya or Antya. Think of it as your body's constitution. Tradition reads it as health and future children, which is why it carries the most points. Different Nadis score the full 8. The same Nadi scores 0, and that is Nadi dosha.

Tradition also lists a few cases where a pandit may set the dosha aside. Bhava applies none of them. Every same-Nadi pair is flagged, even when the total looks good, so that you and your family can take it to your pandit and decide with the whole picture in front of you. The three Nadis and the traditional rules are laid out in Nadi dosha: same Nadi and the cancellation rules.

Why your birth time matters here

A nakshatra is 13 degrees 20 minutes wide, and the Moon moves about 1 degree every two hours. So on most days, a birth time that is off by an hour or two lands in the same star. It matters on the day the Moon crossed from one star to the next close to the hour you were born. Then a rough time can put you in the neighbouring star, and that can move Tara, Yoni, Gana and Nadi all at once.

The Moon sign is more forgiving. It changes about every two and a quarter days, so a rough time rarely moves it. What a rough time does move is your Rising sign, which changes about every two hours. That is a different story: the 36 points do not use it, though the Manglik check does.

If you only know your time roughly, do what the app asks: "Not sure? Ask your mum, or use your best guess. You can change it later." There is more on what still works without a time in Kundali matching without a birth time, and on where to look for it in Where to find your birth time.

Finding yours, and how Bhava shows it

You need three things: the date, the time and the place of your birth. The place matters for two reasons: it tells the app which time zone your birth time was in, and it fixes your Rising sign. Bhava takes those three, uses the Lahiri ayanamsa that most Indian panchangs follow, and shows your nakshatra on your Cosmic ID next to your Moon sign, Rising sign and Gana.

Your birth date, time and place stay private. Other members see your age and your chart, never the details. When you match with someone, the chat has a section called "You two, in depth" that shows both charts and all eight checks in plain words, with any dosha named rather than hidden.

If you have two charts in front of you now, try the Kundali matching calculator. If you would rather not do the counting yourself, that is the check Bhava runs on everyone it introduces, a few people every evening at 7. The nakshatra is where that score begins, and now you know why.