Five unequal bands, no counting at all
The trimshamsha (D30) abandons counting entirely: you look the degree up in a table of five UNEQUAL bands. In odd signs: Mars 0–5°, Saturn 5–10°, Jupiter 10–18°, Mercury 18–25°, Venus 25–30°. Widths five, five, eight, seven, five. Find the band, and you have found the lord.
3° Aries sits in Mars's band. 7° Aries in Saturn's. 26° Leo in Venus's. No parts, no anchors, no advancing — just the table.
The same lords, run backward
Even signs run the SAME five lords in reverse, with mirrored widths: Venus 0–5°, Mercury 5–12°, Jupiter 12–20°, Saturn 20–25°, Mars 25–30°. Read the two tables as one palindrome — Mars, Saturn, Jupiter, Mercury, Venus forward; Venus, Mercury, Jupiter, Saturn, Mars back. Jupiter holds the widest middle band in both.
7° Aries (odd): Saturn's band. 7° Taurus (even): Mercury's. Same degree, opposite parity, different lord — the parity check comes first, always.
No Sun, no Moon — a ten-sign chart
Only the five tara grahas — the true planets Mars, Mercury, Jupiter, Venus, Saturn — rule trimshamshas. The Sun and Moon hold none: the D30 is the one varga that shuts out the luminaries. Each band maps to one of its lord's OWN signs, so Cancer and Leo can never appear as D30 signs.
Odd bands: Mars→Aries, Saturn→Aquarius, Jupiter→Sagittarius, Mercury→Gemini, Venus→Libra. Even bands: Venus→Taurus, Mercury→Virgo, Jupiter→Pisces, Saturn→Capricorn, Mars→Scorpio.
Misfortune, vulnerability, moral fiber
The trimshamsha is the chart of misfortunes, hidden vulnerabilities, and inner fiber — where trouble takes root, and what the character does under pressure. The band's lord sets the tone: Jupiter and Venus bands soften a planet's trials; Mars and Saturn bands harden them. Classical texts leaned on it for judging vulnerability in general.
15° Taurus: Jupiter's band, Pisces — a cushioned trimshamsha. 22° Cancer: Saturn's band, Capricorn — the same trouble lands on thinner armor.
Sixty parts of 0°30′, from the sign itself
The shashtiamsha (D60) cuts each sign into SIXTY parts of 0°30′ and counts them from THE SIGN ITSELF — the D12's rule, five times finer. Find the part (degree over 0.5, round down, add one), advance the sign by part-minus-one. Each amsha also carries a classical NAME with a benefic or malefic charge.
5° Leo: part eleven, ten on from Leo — Gemini. 10° Cancer: part twenty-one, twenty on — Pisces. The names — Ghora, Rakshasa, Deva, Amrita and fifty-six more — you leave to software.
Highest weight, highest price
Parashara weights the D60 HIGHEST among vargas after the D1 in his composite schemes — next lesson's subject. It is the past-life ledger, the final tiebreaker between twins born minutes apart. The cost: a 30′ slice flips in about one minute of birth time. The D60 is only as honest as the birth certificate.
Professionals rectify — adjust a recorded time against known life events — before trusting a D60. Know the practice by name; this course does not teach it.
The meta rule
Thin armor, and the reason why
The D30 shows where the armor is thin; the D60 shows why. Read both late, lightly, and only on a birth time you trust. The D30's bands are degree-based and robust against a shaky clock; the D60 is the opposite — the finest grain in the system, and the most fragile.
Order of trust under a rough birth time: D30 bands hold, D60 planets wobble, D60 lagna is fiction. Precision is a budget; spend it where the clock allows.