PLANETARY ASTRONOMY & GRAHA TAXONOMY☊︎ Rahu (North Lunar Node) in Sidereal Jyotish
In the nine-planet system of Sanskrit positional astronomy, Rahu (Rāhu (Svarbhānu), North Lunar Node) is a shadow malefic (chaya graha) ascending node governing unconventional ambition, foreign residence (Videsha), eclipse thresholds, sudden rise in rank, and material amplification. Within the vectorized reference corpus (jyotish_corpus_core_v3), Rahu appears in 1,226 verified passages and 655 numbered shlokas across 18 Sanskrit treatises.
Rahu (North Lunar Node) rules Kumbha (Aquarius, co-lord), reaches deep exaltation at Vrishabha 20°00' (Taurus), and enters deep debilitation at Vrishchika 20°00' (Scorpio). In the 120-year Vimshottari Dasha cycle, Rahu governs a major planetary period of 18 Years across the lunar mansions Ardra, Swati, Shatabhisha.
EPHEMERIS MECHANICS & PRECESSION DIFFERENTIALSidereal Longitude, Synodic Velocity & Dignity Thresholds of Rahu
High-precision integration for Rahu under DE441
According to Brihat Parashara Hora Shastra Chapter 3 Verses 36 to 37 and Brihat Samhita Chapter 5 (Rahuchara Adhyaya), Rahu gains full directional strength in the Tenth and Seventh House Axis and requires at least 5.00 Rupas via dispositor in six-fold Shadbala. For solar proximity and heliacal visibility of Rahu, classical mathematical astronomy applies a strict standard: Rahu is exempt from solar combustion and instead causes solar and lunar eclipses (Grahana) near syzygy.
| Parameter | Specification | Classical Authority |
|---|---|---|
| Swakshetra Domicile | Kumbha (Aquarius, co-lord) |
Brihat Parashara Hora Shastra Chapter 3 Verses 36 to 37 defines the primary own-sign domicile and planetary rulership of Rahu (North Lunar Node) in the sidereal zodiac. |
| Moolatrikona Arc | Mithuna or Kumbha |
Brihat Samhita Chapter 5 (Rahuchara Adhyaya) specifies the exact root-trine degree zone assigned to Rahu in classical horoscopic evaluation. |
| Exaltation & Fall | Vrishabha 20°00' (Taurus) / Vrishchika 20°00' (Scorpio) |
Phaladeepika Chapter 2 Verse 34 establishes the longitudinal degree of peak exaltation and deep debilitation for Rahu. |
| Natural Friends | Budha, Shukra, Shani |
The classical Panchadha Maitri five-fold compound relationship matrix scores planetary allies of Rahu by sign placement. |
| Neutral & Adversaries | Neutral: Guru | Enemies: Surya, Chandra, Mangala |
Saravali Chapter 4 Verses 46 to 48 details permanent natural friendship, neutrality, and enmity modifiers for Rahu in natal charts. |
MULTI-TREATISE SHASTRA CONCORDANCECorpus Distribution of Rahu Across 18 Sanskrit Shastras
The concordance table below records the exact passage and shloka distribution for Rahu (North Lunar Node) extracted from jyotish_corpus_core_v3. Maharishi Parashara emphasizes divisional varga dignity and Vimshottari timing for Rahu, while Varahamihira and Kalyana Varma detail specific sign-aspect modifications and Drekkana placements for Rahu.
| Sanskrit Treatise | Verified Passages | Chapter Coverage | Analytical Scope |
|---|---|---|---|
| Brihat Parashara Hora Shastra | 298 passages |
52 ch / 218 v |
Codifies sidereal sign dignity, house placement results, and aspect valuation rules for Rahu (North Lunar Node) across 52 classical chapters. |
| Sarvartha Chintamani | 198 passages |
12 ch / 22 v |
Codifies sidereal sign dignity, house placement results, and aspect valuation rules for Rahu (North Lunar Node) across 12 classical chapters. |
| Jaimini Upadesha Sutras | 97 passages |
4 ch / 59 v |
Codifies sidereal sign dignity, house placement results, and aspect valuation rules for Rahu (North Lunar Node) across 4 classical chapters. |
| Prashna Marga | 80 passages |
12 ch / 57 v |
Codifies sidereal sign dignity, house placement results, and aspect valuation rules for Rahu (North Lunar Node) across 12 classical chapters. |
| Phaladeepika | 77 passages |
19 ch / 54 v |
Codifies sidereal sign dignity, house placement results, and aspect valuation rules for Rahu (North Lunar Node) across 19 classical chapters. |
| Brihat Samhita | 74 passages |
21 ch / 55 v |
Codifies sidereal sign dignity, house placement results, and aspect valuation rules for Rahu (North Lunar Node) across 21 classical chapters. |
VERBATIM CORPUS FOLIO & DIVISIONAL HARMONICSArchival Public-Domain Folio Excerpt & Varga Synthesis for Rahu
This archival excerpt for Rahu is retrieved from the public-domain edition of Brihat Parashara Hora Shastra (Chapter 2, Verse 2) in jyotish_corpus_core_v3. In divisional horoscopy, the natal Rashi (D1D9D10
CORPUSPROVENANCE: Brihat Parashara Hora Shastra | SourceID: archive_brihat-parashara-hora-sastra | Chapter 2, Verse 2 "Krishn , endowed with Jiv 2 Maharishi Parashar: O Brahmin, the four incarnations, viz Ram, Krishn, Narasimh and Varah are wholly with Paramatm The other incarnations (than these, out of the ten) have in them Jiv too 3-4 The unborn Lord has many incarnations He has incarnated, as the 9 (Nava) Grahas to bestow"
When Rahu occupies identical sidereal signs in both the natal Rashi (D1D9
SUTRA BLACK LABEL · INDIVIDUAL EPHEMERIS SYNTHESISCompute Exact Rahu Shadbala & Varga Dignities for Birth Coordinates
This encyclopedia entry establishes the astronomical and shastric baseline for Rahu (North Lunar Node). To calculate birth-second sidereal longitude, six-fold Shadbala Virupas, Ashtakavarga bindus, and verbatim shloka citations for Rahu across all 16 Shodashavarga charts, visit jyotish.vip.
Rahu Shadbala RupasDE441Ephemeris (0.001°)Rahu Shloka CitationsVimshottari Dasha Timing
