27 Lunar Mansions
Find your birth Nakshatra
The Moon’s sidereal position at your birth, computed — giving the nakshatra, the pada, the degree it fell on and the Moon sign that follows from it.
What a Nakshatra is
The Vedic zodiac is divided twice. The familiar division gives twelve rashis of thirty degrees each. The older and, in practice, more precise division gives 27 nakshatras of 13°20′ each — the lunar mansions. The Moon completes its circuit of the zodiac in about 27.3 days, so it spends roughly one day in each nakshatra, and the one it occupied at the moment of your birth is your janma nakshatra, or birth star.
Jyotish treats the birth nakshatra as more personally descriptive than the sun sign, for a straightforward reason: the Sun takes a month to cross a sign, so everyone born within thirty days shares it. The Moon crosses a nakshatra in a day. A nakshatra tells you something about a person that a sun sign shared by tens of millions cannot.
Padas: the quarter that changes everything
Each nakshatra subdivides into four padas of 3°20′. The pada is not a footnote — it fixes your position in the navamsa chart, the divisional chart Vedic astrologers read alongside the birth chart for marriage and for the underlying strength of a planet. Two people in the same nakshatra but different padas can read quite differently.
Pada is also where the naming tradition comes from. Each of the 108 padas across all 27 nakshatras carries a syllable, and namakaran — the naming ceremony — traditionally draws the child's first syllable from the pada the Moon occupied at birth.
Ruling planets and the link to your dasha timeline
The 27 nakshatras are ruled by nine lords in a fixed repeating sequence: Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury — running three times over. Ashwini is Ketu's, Bharani is Venus's, Krittika is the Sun's, and so on until Ashlesha closes the first cycle under Mercury and Magha begins the second under Ketu again.
This is what makes the nakshatra the entry point to the whole predictive timeline. The Vimshottari Dasha sequence you were born into is the lord of your birth nakshatra, and how much of that first period remained at birth is set by how far the Moon had already travelled through those 13°20′. Get the nakshatra wrong and every dated prediction that follows is wrong with it.
Gana, Yoni and Nadi — why matching starts here
Every nakshatra carries a set of classificatory attributes. Gana sorts them into Deva, Manushya and Rakshasa temperaments. Yoni assigns an animal, used to read instinctive compatibility. Nadi sorts them into Adi, Madhya and Antya, standing in for constitution in the Ayurvedic sense.
These are not decorative. Six of the eight kootas in Ashtakoot Guna Milan — the 36-point marriage matching system — are computed from the two birth nakshatras rather than from the sun signs. When a pandit asks for a birth nakshatra before discussing a match, this is why.
Why the birth time matters here more than usual
Because the Moon clears a nakshatra in roughly a day, a birth a few hours either side of a boundary falls in a different nakshatra entirely — and with it, a different ruling planet, a different starting dasha and different matching attributes. Date alone puts you in the right neighbourhood; it cannot resolve a boundary case.
This tool computes the Moon's sidereal longitude for the instant you give it, so with a birth time it returns one nakshatra, one pada of four, and the degree the Moon actually stood on. Without a time it returns the two — occasionally three — nakshatras the Moon passed through that day, with the clock times separating them, rather than choosing one. The underlying figure is the truncated ELP-2000 lunar theory reduced by the Lahiri ayanamsa, checked against the JPL DE421 ephemeris day by day.
What it still cannot do is fix a birth time nobody recorded accurately. A pandit will rectify an uncertain time against life events before relying on a pada, and where the Moon sat within a degree of a boundary, that rectification is the whole ballgame.
Frequently asked questions
Is a nakshatra the same thing as my zodiac sign?
No. They are two different divisions of the same zodiac. Your rashi is one of twelve thirty-degree signs; your nakshatra is one of 27 divisions of 13°20′. A single sign spans a little over two nakshatras, so people who share a Moon sign often have different birth stars — and the nakshatra is the more specific of the two.
Can two people with the same nakshatra be incompatible?
Yes, and one koota specifically catches it. Sharing a nakshatra can produce a Nadi dosha, because the same nakshatra usually means the same Nadi group, which Ashtakoot scores at zero out of eight. Matching looks at eight separate factors, so a shared birth star is neither an automatic pass nor an automatic fail.
Does my nakshatra decide my child's name?
It decides the traditional starting syllable. Each of the four padas within a nakshatra carries its own syllable, and namakaran draws the child's first sound from the pada the Moon occupied at birth. It is a convention followed to varying degrees — many families use it for a formal name and choose freely otherwise.
What if I don't know my exact birth time?
You will still get a nakshatra from your date, and on most dates it will be right, because the Moon spends about a full day in each. The risk is a birth near a boundary, where a few hours changes the answer. If a decision depends on it, ask a pandit to rectify the birth time from known life events first.