Alongside the twelve zodiac signs, Vedic astrology uses a second, finer division of the sky: the 27 nakshatras, or lunar mansions. The idea is simple. The Moon takes about 27.3 days to go once around the zodiac against the stars, so it spends roughly one day in each of 27 segments, like a traveler stopping at a different house each night. Each nakshatra has its own ruling planet, presiding deity, symbol and character. In Jyotish, the nakshatra your Moon occupied at birth is considered one of the most personal features of your chart, and it sets the starting point for the planetary periods used in timing. This guide explains how the system works and describes all 27.
The full circle of the zodiac is 360 degrees. Divided into 27 equal parts, each nakshatra spans 13 degrees 20 minutes (13°20′). The first, Ashwini, begins at zero degrees Aries in the sidereal zodiac, and the last, Revati, ends at 30 degrees Pisces.
Because 13°20′ does not divide evenly into a 30-degree sign, nakshatras and signs overlap in a repeating pattern: every 120 degrees, exactly nine nakshatras fit into four signs. Some nakshatras sit entirely inside one sign, and some straddle two. Krittika, for example, begins in the last few degrees of Aries and continues into Taurus.
Nakshatras are measured in the sidereal zodiac, which is about 24 degrees behind the tropical zodiac used in Western astrology. The Western vs Vedic guide explains why. Some older lists include a 28th mansion, Abhijit, but the standard system used for charts and dashas has 27.
Each nakshatra is split into four padas, or quarters, of 3°20′ each. That gives 108 padas around the zodiac, a number with deep significance in Indian tradition.
Each pada corresponds to one sign of the navamsa, the ninth-division chart that Vedic astrologers use alongside the main chart. The first pada of Ashwini maps to Aries in the navamsa, the second to Taurus, and so on through the zodiac in order. Knowing the pada lets an astrologer fine-tune the meaning of a placement: two people with the Moon in the same nakshatra but different padas will be read with slightly different emphasis.
The Moon moves through one nakshatra in about a day and one pada in about six hours. That is why an accurate birth time matters so much for the Moon's nakshatra, and why My Stella leaves it out when the birth time is unknown rather than guessing.
Each nakshatra is ruled by one of nine planets, the seven classical planets plus the lunar nodes Rahu and Ketu. The rulers follow a fixed sequence that repeats three times around the zodiac:
Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury.
So Ashwini, Magha and Mula are ruled by Ketu; Bharani, Purva Phalguni and Purva Ashadha by Venus; and so on.
This sequence is the backbone of the Vimshottari dasha system, the most widely used timing method in Vedic astrology. It divides a 120-year cycle into planetary periods of fixed length: Ketu 7 years, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19 and Mercury 17. Each period is read as a chapter in which that planet's themes are emphasized.
Your first dasha is ruled by the lord of the nakshatra your Moon was in at birth. How much of that first period remains depends on how far the Moon had already traveled through the nakshatra.
A worked example: suppose your Moon was at 5 degrees sidereal Aries. That is inside Ashwini, which runs from 0° to 13°20′ Aries and is ruled by Ketu. The Moon had covered 5° of the 13°20′, leaving 8°20′, or 62.5 percent of the nakshatra. So 62.5 percent of Ketu's 7-year period remained: about 4 years and 4 months. After that, the Venus period begins and runs its full 20 years, followed by the Sun's 6, and so on around the sequence.
Because the dasha balance depends on the Moon's exact degree, even a couple of hours' difference in birth time can shift your dasha dates by months.
The Moon's nakshatra, sometimes called the janma nakshatra or birth star, is read as a portrait of the mind: temperament, instincts and emotional style. Astrologers also look at the nakshatras of the rising sign and of each planet, which add detail the sign alone cannot give.
Nakshatras appear in many other traditional uses too. The Moon's nakshatra is central to ashtakoota compatibility matching (see the synastry guide), to choosing auspicious times, and in some families to choosing the first syllable of a child's name, since each pada has an associated sound.
Positions are in the sidereal zodiac. Ruler in parentheses.
You need your birth date, place and time. With a known birth time, you can see your own birth chart in the Vedic view on My Stella, which shows the Moon's nakshatra and pada.
Twenty-seven in the standard system, each spanning 13 degrees 20 minutes of the sidereal zodiac. Some older lists add a 28th, Abhijit, but it is not used for dashas.
The Moon moves about 13 degrees a day, so it changes nakshatra roughly once a day and pada roughly every six hours. Without a birth time, the Moon's nakshatra can be uncertain.
Each nakshatra is split into four padas of 3 degrees 20 minutes. There are 108 in total, and each one corresponds to a sign in the navamsa chart.
No. The Moon sign is one of 12 signs of 30 degrees. The nakshatra is a finer division of 27 segments, so it gives more detail about the Moon's placement.