Gayatri mantras for planets

Horoscope - janmakundali is an astrological chart that represents the positions of planets at the time of birth of a person. From the horoscope it can be known which planet will rule for how much time during the lifespan of the person. These planetary periods are known as dashas or mahadashas. Person may go through favorable or unfavorable experiences during these mahadashas depending on positions and other aspects of the planets. To remedy unfavorable effects, shastras recommend 108 times chanting of gayatri mantra of ruling planet.

Gayatri mantra for each planet is as follows

सूर्य (Sun)	ॐ अश्वध्वजाय विद्महे पाशहस्ताय धीमहि तन्नो सूर्य प्रचोदयात् | Om Ashwadhwajay Vidmahe Pasha Hastaya Dheemahi  Tanno Soorya  Prachodayat
चंद्र (Moon)	ॐ पद्मध्वजाय विद्महे हेमरुपाय धीमहि तन्नो सोम प्रचोदयात् | Om Padmadhwajaya Vidmahe Hema Roopaya Dheemahi Tanno Soma Prachodayat
मंगळ (Mars)	ॐ वीरध्वजाय विद्महे विघ्नहस्ताय धीमहि तन्नो भौम प्रचोदयात् | Om Veeradhwajaya Vidmahe Vighna Hastaya Dheemahi  Tanno Bhauma Prachodayat
बुध (Mercury)	ॐ गजध्वजाय विद्महे शुकहस्ताय धीमहि तन्नो बुध प्रचोदयात् | Om Gajadhwajaya Vidmahe Shuka Hastaya Dheemahi Tanno Budha  Prachodayat
गुरु (Jupiter)	ॐ वृषभध्वजाय विद्महे घ्रिणीहस्ताय धीमहि तन्नो गुरु प्रचोदयात् | Om Vrishabhadhwajaya Vidmahe Ghrini Hastaya Dheemahi Tanno Guru Prachodayat
शुक्र (Venus)	ॐ अश्वध्वजाय विद्महे धनुर्हस्ताय धीमहि तन्नो शुक्र प्रचोदयात् | Om Ashwadhwajaya Vidmahe Dhanur Hastaya Dheemahi Tanno Shukra Prachodayat
शनि (Saturn)	ॐ काकध्वजाय विद्महे खड्गहस्ताय धीमहि तन्नो मंद  प्रचोदयात् | Om Kakadhwajaya Vidmahe Khadga Hastaya Dheemahi Tanno Manda Prachodayat
राहु (Rahu)	ॐ नागध्वजाय विद्महे पद्महस्ताय धीमहि तन्नो राहु प्रचोदयात् | Om Nagadhwajaya Vidmahe Padma Hastaya Dheemahi Tanno Rahu Prachodayat
केतु (Ketu)	ॐ अश्वध्वजाय विद्महे शूलहस्ताय धीमहि तन्नो केतु प्रचोदयात् | Om Ashwadhwajaya Vidmahe Shoola Hastaya Dheemahi Tanno Ketu Prachodayat