Domain
Soul, vitality, leadership. Surya is the karaka of the soul — atma — and of leadership, vitality and political will. A weak Surya in the kundali manifests as low confidence and frequent fatigue.
Sacred day
Sunday. Activate the yantra at sunrise on this day for the strongest field.
Bija mantra
Om Hraam Hreem Hraum Sah Suryaya Namaha
Chant 108 times daily during the activation period (40 days minimum), and 27 times daily thereafter.
Recommended yantra
Gayatri Yantra Card — the traditional Bhagya Cards pairing for Surya (Sun).
When to invoke
If your kundali shows Surya (Sun) as a weak or afflicted graha, or if you are currently in its mahadasha or antardasha, the yantra is the standard upaaya. Combine with the bija mantra, a charity in the planet's name, and (for some grahas) fasting on the appropriate day.
Cross-references
See also: Yantras by zodiac sign · Navagraha — full glossary entry · All yantras.