Pillar article
Guru Chandal Yoga: Jupiter Conjunct Rahu
Guru Chandal yoga is the conjunction of Jupiter and Rahu in one sign. Jupiter is the karaka of wisdom, children, and the guru, with a sixteen-year mahadasha, and he aspects the 5th, 7th, and 9th from that sign. Rahu amplifies the same sign and runs eighteen years when his period comes. The conjunction bends Jupiter's topics toward unconventional teachers, foreign doctrine, or a crowded public use of knowledge. The house they occupy decides whether that bend is career, marriage, or faith.

A named conjunction, not a curse by default
Jupiter is exalted in Karka and debilitated in Makara. Rahu, in the list most Parashari students use, is exalted in Vrishabha. The conjunction can therefore be a strong Jupiter with Rahu, a weak Jupiter with Rahu, or a middling one. Calling every case Chandal and stopping is how the name became a scare. In the 9th, the pair touches dharma directly. In the 10th, it touches public teaching or a career that uses belief. In the 5th, it touches intelligence and children, and the children question still needs the 5th lord, not only the nickname. Jupiter's aspects carry the conjunction's tone into the 5th, 7th, and 9th from the occupied sign, so a 1st-house conjunction looks at the 5th, 7th, and 9th.
Ketu is opposite, always
Rahu conjunct Jupiter means Ketu is in the opposite sign, unoccupied by Jupiter. The axis is wisdom on one side and detachment on the other. If the pair is in the 9th, Ketu falls in the 3rd. If the pair is in the 1st, Ketu falls in the 7th, which puts detachment on marriage while Rahu enlarges the self through Jupiter. That geometry is more useful than the yoga's reputation. Debilitation of Jupiter in Makara with Rahu is the harder dignity. Exaltation in Karka with Rahu is a loud, not automatically ruined, Jupiter. Neecha bhanga can apply to the debilitated case under the usual cancellation rules. The name of the yoga does not cancel the cancellation.
Sixteen years and eighteen
The conjunction speaks in Jupiter mahadasha, Rahu mahadasha, and their mutual antardashas. Jupiter-Rahu lasts 16 times 18 divided by 120, which is 2 years and about 5 months. Rahu-Jupiter lasts 18 times 16 divided by 120, which is 2 years and about 5 months as well, the same product. Those slices are the loud windows. A Thursday practice suits Jupiter. Durga worship is the usual remedial devotion for Rahu. Neither moves the conjunction. Jyothish SI will show whether Jupiter and Rahu share a sign after the chart is cast. It will not call the yoga from a Sun sign.
Frequently asked questions
What is Guru Chandal yoga?
Jupiter and Rahu in the same sign. The result follows that house, Jupiter's dignity, and the dashas of Jupiter and Rahu, sixteen and eighteen years.
Where is Ketu when this yoga exists?
In the opposite sign. Rahu and Ketu never share a sign. The conjunction is only Jupiter with Rahu, and Ketu marks the other pole.
How long is Jupiter-Rahu antardasha?
Sixteen times eighteen, divided by 120, about 2 years and 5 months. Rahu-Jupiter uses the same product inside Rahu's eighteen-year mahadasha.
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D1, D9, D10, dashas, yogas, and transits, the same calculations referenced in this article.
