Ṣoḍaśāṃśa (D-16)

Ṣoḍaśāṃśa (षोडशांश, also written Shodashamsha or Kalāṃśa) — the D-16 chart — is the ninth of the sixteen classical Ṣoḍaśa- vargas described in Brihat Parāśara Horā Śāstra. The Ṣoḍaśāṃśa reads the vāhana-sukha register — vehicles, conveyances, the comfort-pleasures dimension of life, and the acquired-resources that contribute to the native's ease of movement and living. The name ṣoḍaśāṃśa is Sanskrit for "sixteenth part." Classical tradition also names this varga Kalāṃśa in some regional sources.

Classical grounding

Brihat Parāśara Horā Śāstra's Ṣoḍaśa-varga-adhyāya names the Ṣoḍaśāṃśa's computational rule and its vāhana-sukha register signification; Bṛhat Jātaka of Varāhamihira chapter 8 and Phaladeepikā supply extended treatment. The D-16 is included in the full Ṣoḍaśa-varga graded scheme, where it supplements the Rāśi and the earlier vargas for a specialised reading of the acquired-comfort register.

Computational scheme

BPHS's division rule for D-16: each 30° rāśi is divided into sixteen 1°52'30" parts (30° ÷ 16 = 1.875°), with rāśi-ownership assigned by the rāśi's element. For movable (cara) rāśis (Meṣa, Karka, Tulā, Makara), the ṣoḍaśāṃśa-count begins from Meṣa and proceeds sequentially through sixteen consecutive rāśis (wrapping through the zodiac: Meṣa, Vṛṣabha, Mithuna, Karka, Siṃha, Kanyā, Tulā, Vṛścika, Dhanu, Makara, Kumbha, Meena, Meṣa, Vṛṣabha, Mithuna, Karka). For fixed (sthira) rāśis (Vṛṣabha, Siṃha, Vṛścika, Kumbha), the count begins from Siṃha. For dual (dvisvabhāva) rāśis (Mithuna, Kanyā, Dhanu, Meena), the count begins from Dhanu. The starting-point convention uses the fire-rāśi of each elemental triad as anchor: Meṣa for movable, Siṃha for fixed, Dhanu for dual.

Classical significations

The Ṣoḍaśāṃśa-chart classically reads vāhana-sukha — vehicles, conveyances (including the classical register extending from riding animals and chariots to the native's modern equivalents), the comfort-dimension of domestic life, and the acquired-pleasure register of resources used for ease and movement. Classical reading: the 4th-bhāva of the D-16 chart reads the acquired-comfort register specifically; the Lagna of the D-16 reads the native's orientation toward comfort-register pursuits; Śukra as the classical bhoga- kāraka (enjoyment-kāraka) and Mangala (vāhana-kāraka in some classical readings) are cross-referenced. The D-16 is also classically read for the happiness-register derived from acquired possessions and conveyances.

Classical interpretation register

The classical interpretation register of the Ṣoḍaśāṃśa is vāhana- sukha-specific — the chart specialises a distinct register that the Rāśi-chart's 4th-bhāva and the Caturthāṃśa (D-4) introduce but do not exhaust. Classical commentators note the D-16's particular reading weight for the conveyance-register specifically (vehicles, the native's capacity to acquire them, and the comfort-register derived from their use) and for the general happiness-register associated with acquired resources. The vargottama condition in the D-16 is classically a strength-register; it occurs only in very specific 1°52'30" ranges per rāśi-element. The D-16 is included in classical graded-varga schemes from Ṣoḍaśa-varga. As with all vargas, the classical tradition reports the register the chart reads; the reader's life-circumstances and relationships with material possessions are the reader's.

Related Concepts

• Rāśi (D-1) — primary chart
• Sukha-bhāva (4th) — 4th bhāva — underlying sukha register
• Caturthāṃśa (D-4) — paired residence-comfort reading
• Śukra — classical bhoga-kāraka
• Mangala — classical vāhana-kāraka in some classical readings