Ṣaṣṭiāṃśa (D-60)

Ṣaṣṭiāṃśa (षष्ट्यांश, also written Shashtiamsha or Shastyamsa) — the D-60 chart — is the sixteenth and final varga of the classical Ṣoḍaśa-vargas described in Brihat Parāśara Horā Śāstra. The Ṣaṣṭiāṃśa reads the sarva-viśiṣṭa register — all matters in their most-specific fine-detail dimension — and is classically associated with the pūrva-janma-karma (past-karma) reading. Classical tradition regards the D-60 as the most granular of the sixteen vargas and the one most directly tied to the classical karma- continuity framework. BPHS itself names the Ṣaṣṭiāṃśa as particularly weighted in the reading of past-karma registers.

Classical grounding

Brihat Parāśara Horā Śāstra's Ṣoḍaśa-varga-adhyāya names the Ṣaṣṭiāṃśa's computational rule and assigns each of the 60 parts per rāśi a specific named deity with a specific classical signification. BPHS states explicitly that the D-60 carries particular weight in the assessment of a chart's overall register — a classical statement that later commentators have elaborated as the D-60's special connection to past-karma reading. Classical sources including Phaladeepikā, Saravali, and regional compendia reproduce the 60-deity table per rāśi; the table is the defining feature of the D-60 reading alongside the basic rāśi-placement.

Computational scheme

BPHS's division rule for D-60: each 30° rāśi is divided into sixty 30' parts (30° ÷ 60 = 0.5°, or 30 arcminutes per part), with the ṣaṣṭiāṃśa-count beginning from the same rāśi for all rāśis regardless of parity or element (the same uniform convention used for the Dvādaśāṃśa D-12). The sixty ṣaṣṭiāṃśas of any rāśi therefore proceed sequentially through all twelve rāśis five times starting from the rāśi itself. Example: Meṣa's first ṣaṣṭiāṃśa (0°–30') is Meṣa; the sixtieth (29°30'–30°) is Meena (five full cycles of 12 rāśis). The 30-arcminute precision of the D-60 makes it the most birth-time-sensitive of all classical vargas — a difference of one minute in birth-time can shift a graha's D-60 placement by one or two parts.

Classical significations

The Ṣaṣṭiāṃśa-chart classically reads sarva-viśiṣṭa — all matters in their most-granular fine-detail register, with specific classical association to pūrva-janma-karma (past-life karma) register. Classical reading: each of the 60 parts per rāśi carries a named deity (Ghora, Rākṣasa, Deva, Kubera, Yakṣa, Kinnara, Bhraṣṭa, Kulaghna, Garala, Vahni, Māyā, Pūrṇacandra, Viṣadagdha, Kulanāśa, Vaṃśakṣaya, Utpāta, Kāla, Saumya, Komala, Śītala, Karāla-daṃṣṭra, Candra-mukha, Praveena, Kāla-pāvaka, and so on through the complete 60-deity table per rāśi). The classical deity-assignments are reproduced in full in BPHS's Ṣoḍaśa-varga-adhyāya and in subsequent classical compendia; the full 60-name table per rāśi is extensive and is not tabulated here — the reader is directed to the classical source for the complete table.

Classical interpretation register

The classical interpretation register of the Ṣaṣṭiāṃśa is sarva- viśiṣṭa with past-karma specialisation. Classical commentators emphasise that the D-60 reading is sensitive to birth-time precision and that errors in recorded birth-time can substantially affect the D-60 reading — a concern that BPHS itself notes. The D-60 is included in the full Ṣoḍaśa-varga and in the Vaiśeṣikāṃśa strength-scoring. Classical tradition treats the D-60 as a diagnostic register concerning past-karma significations; the reading reports what the classical tradition associates with the native's chart at this fine-detail level. As with all vargas, the reader's life-circumstances and ethical choices are the reader's; the classical tradition reports the register, not the conclusion.

Related Concepts

• Rāśi (D-1) — primary chart
• Āyus-bhāva (8th) — 8th bhāva — pūrva-janma-karma register
• Vyaya-bhāva (12th) — 12th bhāva — mokṣa and completion register
• Saptaviṃśāṃśa (D-27) — paired strength register