Shatabhisha

Shatabhisha is the twenty-fourth nakshatra, from 306 degrees 40 minutes to 320 degrees of the sidereal zodiac in Aquarius. Its Vimshottari ruler is Rahu, its presiding deity is Varuna, god of the cosmic waters and the moral order, and its symbol is an empty circle, read as the hundred physicians or hundred stars its name recalls. The name means the hundred healers. Jyotisha reads Shatabhisha through healing, secrecy, and the veiling circle, the enclosure that both hides and protects, the medicine that works unseen, and classes it as Rakshasa gana. Varuna's association gives it a theme of hidden law and cleansing waters. These are interpretive conventions of the tradition, laid over the faint scattered stars of Aquarius that Indian astronomy assigns to this segment.

Shatabhisha's padas run through Aries, Taurus, Gemini and Cancer. Varuna in the earliest Vedic hymns is a figure of considerable cosmic authority, guardian of rita, the moral and physical order of the universe, and enforcer of oaths through the noose with which he is traditionally depicted binding oathbreakers, an office that only later narrowed toward the more limited later-Puranic role of ocean god; Shatabhisha's presiding deity therefore carries an older and weightier charge than the water association alone suggests. The mansion is, with Ardra and Swati, one of three under Rahu's Vimshottari rulership, and its reading as a mansion of secrecy and hidden medicine is sometimes explained by jyotishis as this shared shadow-planet influence expressing itself through Varuna's own association with what is unseen and unspoken.

A nakshatra spans thirteen degrees twenty minutes, which is a wide gate. The four padas that quarter it are what make the division precise enough to be worked with. Shatabhisha runs from 306 degrees 40 minutes to 320 degrees 00 minutes of the sidereal circle, and its four padas are three degrees twenty minutes each: the first from 6 degrees 40 minutes of Aquarius, the second from 10 degrees 00 minutes of Aquarius, the third from 13 degrees 20 minutes of Aquarius and the fourth from 16 degrees 40 minutes of Aquarius. The Moon crosses a single pada in roughly six hours, so a birth an afternoon apart can fall in two of them.

The arithmetic hides a coincidence that is not one. Twenty seven nakshatras of four padas make one hundred and eight divisions of the zodiac, and the navamsha, the ninth-part chart that jyotisha treats as the most important of all the divisional charts, also cuts the circle into one hundred and eight. They are the same cut. A pada is a navamsha, and naming the pada names the navamsha sign without any further calculation. The four padas of Shatabhisha fall in Sagittarius, Capricorn, Aquarius and Pisces in that order.

Two cautions attach to those degrees. They are sidereal, measured from a fixed point among the stars rather than from the equinox, so they depend on the ayanamsha chosen to locate that point; the Lahiri, Raman and Krishnamurti values differ by up to about a degree, which is a fifth of a pada and enough to move a chart across a boundary. And the equal arcs are a scheme laid over the sky rather than a description of it: the star the nakshatra is named for sits somewhere inside its arc rather than filling it, and for several nakshatras that identification is itself disputed.