When entered into a JavaScript console, a jQuery object appears as an array. However, it\'s still an instance of the jQuery object.
var j = jQuery();
=> [
I think what you're trying to see are your object's properties. If that's the case, you're inadvertently converting the object into a string when you append it to another string. Use the , operator instead of + to show the object properties instead of the "stringified" version of the object:
console.log('test with string concat: ', j);