Koṭa Cakra
The fort of the birth star. The twenty-eight nakṣatras — Abhijit among them — are laid out around your janma nakṣatra as a walled fort: open ground, rampart, inner court and the pillar at the centre. Place the grahas of any moment upon it and see who is entering by the corner gates, who is leaving by the straight roads, who holds the keep, and where the lord and the guard of the fort are standing.
The Fort
North is at the top, east at the right. The janma nakṣatra (gold outline, count 1) sits outside the north-east gate; the count runs clockwise, in by the corner gates and out by the straight roads. Red arrowheads mark the four entrances, green the four exits. Transit grahas are the solid chips — hover or tap one to light its road; the birth-chart grahas, if shown, are the dashed ones.
The Nine Grahas on the Fort
Each graha’s nakṣatra is counted from the janma nakṣatra (#1). A direct graha walks the count forward — in by a gate, across the court, into the pillar, out by the next road; a retrograde graha walks it backward, so an exit becomes an entrance. Rāhu and Ketu are always retrograde; the Sun and Moon never are. A ± marks a graha within ¼° of a nakṣatra boundary.
| Graha | Sidereal position | Nakṣatra · count | Ring | Road | Motion | In the fort | Nature |
|---|
Ring by Ring
The four rings of this fort, with the nakṣatras that fall in each and the grahas standing there now.
The Next Two Years at the Gates
When the slow grahas — Śani, Guru, Rāhu, Ketu and Maṅgala — next change nakṣatra or turn on this fort, day by day from the moment examined. The Sun, Moon, Mercury and Venus move too quickly to list.
| Date | Graha | Crossing |
|---|
How to Read the Fort
The fort
The Koṭa Cakra (koṭa, a fort) lays the twenty-eight nakṣatras, Abhijit included, around the Moon’s birth star in four rings. Counting from the janma nakṣatra as 1: the 4th, 11th, 18th and 25th form the Stambha, the pillar; the 3rd, 5th, 10th, 12th, 17th, 19th, 24th and 26th the Madhya, the inner court; the 2nd, 6th, 9th, 13th, 16th, 20th, 23rd and 27th the Prākāra, the rampart; and the 1st, 7th, 8th, 14th, 15th, 21st, 22nd and 28th the Bāhya, the ground outside the walls.The roads
Four diagonal roads lead in through the corner gates (north-east, south-east, south-west, north-west); four straight roads lead out by the cardinal points (east, south, west, north). A graha in direct motion walks the count forward: in at a corner, over the rampart, across the court, into the pillar, and out again by the next straight road. Retrograde motion reverses the sense — a retrograde graha on an exit road is coming in — and Rāhu and Ketu are always retrograde.Besiegers and garrison
The natural malefics — Sūrya, Maṅgala, Śani, Rāhu, Ketu, the Moon in the dark part of her month (outside the eighth day of the waxing fortnight to the eighth of the waning), and Budha in their company — are the besiegers; the benefics — Guru, Śukra, Budha, the bright Moon — are the garrison. Malefics inside the walls (Madhya, and above all the Stambha) mean suffering of the body or of the matter at hand; benefics inside protect it. A malefic on an exit road is a besieger leaving; a benefic on an exit road is support withdrawing.Lord and guard
The Koṭa-svāmī, lord of the fort, is the lord of the Moon-sign; the Koṭa-pāla, its guard, is the graha of the letter-class to which the syllable of the Moon’s pāda belongs (vowels to the Sun, ka to Mars, ca to Venus, ṭa to Mercury, ta to Jupiter, pa to Saturn, the semivowels to the Moon, the sibilants to Rāhu) — or, on the simpler convention, the nakṣatra’s Viṃśottarī lord. The lord is best inside the walls, the guard best outside, watching the approaches.The rules, in order of weight
- Malefics in the Stambha: trouble to the body and the core of the matter.
- Malefics on the entrances while the benefics are on the exits: Durga-bhaṅga, the breach. The reverse is the winning picture.
- Śani (about a year in each nakṣatra), Rāhu and Ketu (seven months), Guru (four to five) carry the weight; Maṅgala for weeks; the Moon passes in a day.
- A retrograde benefic has turned its back: protection withdrawn. Rāhu and Ketu are treated as always retrograde.
- The lord inside, the guard outside.
What it is for — and what it is not
The fort is a timing instrument for ariṣṭa: illness and recovery, accident, litigation, the loss or defence of a post, and — in its first use — the fate of a besieged city or a nation under attack. It does not stand alone: the running daśā governs. A strong period blunts a siege; a weak one lets it through. Use the two-year table above to see when the heavy grahas next cross a gate, and read those months against the daśā.AyurAstro® · Renay Oshop · ayurastro.com/tool-kota-chakra.html