move around sphere

void RotateBullet(Vector2 to)
    {
            Vector2 pos = bullet.transform.localPosition.normalized;
            float angle = Mathf.Atan2(pos.y - to.y, pos.x - to.x);
            Debug.Log($" position: {pos} direction: {to} angle: {angle}");
            float x = pos.x+ Mathf.Cos(angle) * radius;
            float y = pos.y + Mathf.Sin(angle) * radius;

            var desired = new Vector2(x, y);
        bullet.transform.localPosition = desired;
    }