Ark wood is from aank tree used for hawana. The mantra to overcome obstacles due to afflicted Sun is given as “ Om Hram Hreem Hroma Saha Suraya Namah"
Surya is the chief, the solar deity, one of the Adityas, son of Kasyapa and one of his wives Aditi. He has hair and arms of gold. His chariot is pulled by seven horses, which represent the seven chakras. He presides as "Ravi" over "Ravi-var" or Sunday.