Triṃśāṃśa (D-30)

Triṃśāṃśa (त्रिंशांश, also written Trimshamsha or Trimsamsa) — the D-30 chart — is the thirteenth of the sixteen classical Ṣoḍaśa-vargas described in Brihat Parāśara Horā Śāstra. The Triṃśāṃśa reads the ariṣṭa register — classical miseries and specific afflictions, the register of difficulty-events the native may classically encounter. The name triṃśāṃśa is Sanskrit for "thirtieth part," reflecting the 30-degree rāśi and signalling that each part corresponds to one degree — but the D-30 uses a distinctive non-uniform division scheme that sets it apart from all other supplementary vargas.

Classical grounding

Brihat Parāśara Horā Śāstra's Ṣoḍaśa-varga-adhyāya specifies the Triṃśāṃśa's distinctive non-uniform computation; Bṛhat Jātaka of Varāhamihira chapter 8 names the same scheme with extended classical commentary; Phaladeepikā and Saravali supply extended treatment of the ariṣṭa-register applications. Classical sources uniformly name the D-30 as the primary varga for specific-affliction assessment — a register distinct from the general difficulty-register of the Rāśi's dusthāna-bhāvas.

Computational scheme

BPHS's division rule for D-30 is non-uniform and differs from every other classical varga. Sūrya and Chandra are not assigned triṃśāṃśas; only the five tārā-grahas (Mangala, Śani, Guru, Budha, Śukra) receive triṃśāṃśa-ownership. In odd rāśis (Meṣa, Mithuna, Siṃha, Tulā, Dhanu, Kumbha), the 30° is divided into five unequal parts: the first 5° (0°–5°) is Mangala's triṃśāṃśa (Meṣa); the next 5° (5°–10°) is Śani's (Kumbha); the next 8° (10°–18°) is Guru's (Dhanu); the next 7° (18°–25°) is Budha's (Mithuna); the final 5° (25°–30°) is Śukra's (Tulā). In even rāśis (Vṛṣabha, Karka, Kanyā, Vṛścika, Makara, Meena), the division reverses in graha-order and each graha's rāśi-assignment switches to its even-rāśi counterpart: the first 5° (0°–5°) is Śukra's (Vṛṣabha); the next 7° (5°–12°) is Budha's (Kanyā); the next 8° (12°–20°) is Guru's (Meena); the next 5° (20°–25°) is Śani's (Makara); the final 5° (25°–30°) is Mangala's (Vṛścika). The degree-ranges (5-5-8-7-5 and its reverse 5-7-8-5-5) and the graha-rāśi assignments are fixed by BPHS and must be applied exactly.

Classical significations

The Triṃśāṃśa-chart classically reads ariṣṭa — classical miseries, specific afflictions, difficulty-events, accident-register susceptibilities, and the general register of what the classical tradition names as the native's inherited misfortune-register. Classical reading: the graha placed in the native's Lagna- triṃśāṃśa reads strongly for the native's constitutional difficulty-inclination; malefic placement in the Lagna-triṃśāṃśa classically names specific difficulty-registers (Mangala-triṃśāṃśa for injury-register, Śani-triṃśāṃśa for chronic-difficulty register, and so on per classical graha-register correspondences).

Classical interpretation register

The classical interpretation register of the Triṃśāṃśa is ariṣṭa- specific — the chart reads a diagnostic register concerning the difficulty-dimensions of life, not a register that predicts specific events deterministically. Classical commentators emphasise that the D-30 supplements the dusthāna-bhāva readings (6/8/12) of the Rāśi- chart and the Rāśi-chart's malefic placements, and that the D-30 reading is classically a diagnostic framework — the tradition reports the register the chart reads; the reader's life-circumstances are not determined by the chart. The D-30 is included in classical graded-varga schemes from Ṣoḍaśa-varga. Some classical ariṣṭa- bhaṅga (cancellation-of-affliction) rules specifically reference the D-30: benefic placement in Lagna-triṃśāṃśa or strong Lagna- lord presence classically cancels specific afflictions.

Related Concepts

• Rāśi (D-1) — primary chart
• Ripu-bhāva (6th) — 6th bhāva — part of dusthāna triad
• Āyus-bhāva (8th) — 8th bhāva — part of dusthāna triad
• Vyaya-bhāva (12th) — 12th bhāva — part of dusthāna triad
• Mangala — one of the five tārā-grahas owning D-30 divisions
• Śani — one of the five tārā-grahas owning D-30 divisions
• Bṛhaspati — one of the five tārā-grahas owning D-30 divisions
• Budha — one of the five tārā-grahas owning D-30 divisions
• Śukra — one of the five tārā-grahas owning D-30 divisions
• Vipareeta Rāja-yoga — classical reversal-of-affliction framework