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 two plans agree on the corner gates and the pillar and differ on the straight roads out: the text takes them from the pillar straight onto the rampart and then outside (stones 5, 6, 7 of each quarter), the modern school through the court, the rampart and the ground outside. Eight of the twenty-eight stones change ring; the sense of travel does not.
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 zones. Counting from the janma nakṣatra as 1, the 4th, 11th, 18th and 25th stones form the Stambha, the pillar, on either plan. On the modern plan (K. N. Rao’s school) the 3rd, 5th, 10th, 12th, 17th, 19th, 24th and 26th are 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. On the plan printed in the Narapatijayacaryā (verses 19–24 of its fort chapter) the court is the 3rd, 10th, 17th and 24th only; the rampart the 2nd, 5th, 9th, 12th, 16th, 19th, 23rd and 26th; and twelve stones lie outside — the 1st, 6th, 7th, 8th, 13th, 14th, 15th, 20th, 21st, 22nd, 27th and 28th. Choose the plan under Conventions.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) — the text’s praveśa and nirgama. 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 (the text says so in as many words: rāhuketū sadā vakrau).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 (about eight 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 — the modern rule; the old commentary says the opposite, that retrogression makes a benefic more benefic and a malefic more malefic. Rāhu and Ketu are 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; the Narapatijayacaryā’s own rules (its verses 45–98) are all of that last kind, with the Moon as lord of the fort and the Sun as lord of the besiegers. 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