 कामं शतं सहस्रं वा न ह्येष विधिरुच्यते।योजनानां भवान् शक्तो गन्तुं प्रतिनिवर्तितुम्।। 
 You can go upto even a hundred thousand yojanas and have the required energy to return also. But it is not proper to send you because you are the heir apparent.  