Best way to make an image follow a circular path in JQuery?

Question

I have an image (red, below), that I want to make travel along a circular path. The red image should always end in the same spot as it started.

Notes:

Answer 1

Do you really need a library, it's not that hard to do

$(document).ready(function (e) {
    var startAngle = 0;
    var unit = 215;

    var animate = function () {
        var rad = startAngle * (Math.PI / 180);
        $('.circle').css({
            left: 250 + Math.cos(rad) * unit + 'px',
            top: unit * (1 - Math.sin(rad)) + 'px'
        });
        startAngle--;
    }
    var timer = setInterval(animate, 10);
});

FIDDLE

Here's one that does one loop, stops at the same place etc.

$(document).ready(function (e) {
    var startAngle = 180;
    var unit = 215;

    var animate = function () {
        if (startAngle > -180) {
            var rad = startAngle * (Math.PI / 180);
            $('.circle').css({
                left: 250 + Math.cos(rad) * unit + 'px',
                top: unit * (1 - Math.sin(rad)) + 'px'
            });
            startAngle--;
            setTimeout(animate, 10);
        }
    }

    $('.circle').on('click', function() {
        startAngle = 180;
        animate();
    });

});

FIDDLE