chandimabandara on "How to center my image header"

Guys I have installed a responsive theme and now I want my header image to be at the center. currently its in the left

here is my header code :
}
#header {
position: relative;
width: 100%;
max-width: 1050px;
margin: 0 auto;
padding: 20px 0 12px 0;
min-height: 80px;
overflow: hidden;
}
#header h1, #header h2 {
font-size: 44px;
display: inline-block;
line-height: 1;
margin: 23px 0 0;

what alterations should I make?