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Ketu antardasha in Rahu mahadasha

The Ketu antardasha within the Rahu mahadasha is also written Rahu–Ketu.

Source: BPHS (Santhanam) 46.12–14, Vimshottari order from Krittika: Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury, Ketu, Venus

In your chart

Mahadasha
Rahu
Antardasha
Ketu
Mahadasha length
18 years
BPHS 46.15
Working
18×7/120 = 126/120 = 1.050000 years
BPHS 51.1
Duration
1 year, 18 days
Position in the mahadasha
5

How long it lasts

The Rahu mahadasha lasts 18 years. Antardasha = 18×7/120 = 126/120 = 1.050000 years, i.e. about 1 year, 18 days.

Here 1 year = 365.25 days.

The order of the antardashas

The Rahu mahadasha opens with Rahu's own antardasha (BPHS ch. 51: the first antardasha belongs to the dasha lord), then the planets follow in Vimshottari order: Rahu → Jupiter → Saturn → Mercury → Ketu → Venus → Sun → Moon → Mars. The Ketu antardasha is the fifth in this sequence and begins 10 years, 6 months after the mahadasha starts.

What tradition holds

Tradition links the Rahu mahadasha with unfamiliar paths, ambition and change, and reads the Ketu antardasha as adding a note of turning inward, simplicity and the spiritual. The two shadow planets meet: the wish for the new and the lesson of letting go run side by side. It is a period tradition reads as asking for patience and routine; the real picture comes from where both planets sit in the chart.

In your chart

See when this period falls in your chart, and where both planets sit, in the free kundli.

Read next

Rahu: the north node of the Moon's pathKetu: the south node of the Moon's pathWhat is the Vimshottari dasha and how is it worked out?

Sources

  • BPHS (Santhanam) 46.12–14 · Vimshottari order from Krittika: Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury, Ketu, Venus
  • BPHS (Santhanam) 46.15 · Dasha years 6, 10, 7, 18, 16, 19, 17, 7, 20 (OCR shows "6,lO, 7, 18, 16, 19,l'1,7 and20")
  • BPHS (Santhanam) 46.12–14, translator's note · 120 years in total
  • BPHS (Santhanam) 51.1 · Antardasha = MD years × AD years ÷ total dasha years (120)
  • BPHS (Santhanam) 51.1, notes · Worked example: Venus–Venus = 20×20/120 = 3 years 4 months
  • BPHS (Santhanam) 51.1, notes · Shortcut: MD×AD, drop the last digit as months, the last digit ×3 as days (360-day reckoning); Saturn–Mercury 17×19 = 323
  • BPHS (Santhanam) 51.2 · The first antardasha belongs to the dasha lord; the rest follow the dasha order
  • Praśna Mārga (Raman tr.) stanza 65, notes · An example of the 360-day year in a dasha context (the praśna daśā, not the natal one)

Checked against the classical texts · Last reviewed: 2026-10-14