As the First Planetary Hour Ruler today,01 04 18, is the Sun and Arka Shambhu.....
   Omkaram Bindu Samyuktam or Shad Akshara Stotra 

This is known as Shad Akshara Mantra

With six verses, beginning with

Each letter of the six glorious letters,

Om, Na Ma Si Va Ya !

The letters Six are He !

He who is of the nature of AUM

Symbolising the three states relative

Waking, dreaming and dreamless sleep

And the Fourth, Transcendence

Who resides as Dot in the Heart

Meditated by Yogis ever

Who is the conferror

Of both Liberation and Prosperity

To Him of the form of AUM

I bow in reverential awe !

Omkaaram Bindu-Samyuktam Nityam Dhyaayanti Yoginah
Kaamadam Mokssadam Caiva Omkaaraaya Namo Namah

More at http://www.eastrovedica.com/html/omkarambindu.htm