I had some sympathy right up to the point where you asked, "Will the trustee be able to track down this property ..." If you think that way, you are headed for perjury and bankruptcy fraud. You must disclose the transfer and accept whatever comes as a consequence. Be smart -- retain a bankruptcy attorney, who will properly advise you.
Merely holding title to a property does not make it yours. However, because it was under your name and transferred to your sister within the past 2 years, you should disclose it to the trustree and explain who the property actually belongs to and why it was under your name during the time that it was. If you can show that they property was being held for someone else who paid the taxes, collected the rent, etc. there is a good chance that the trustee will not pursue it. Also noteworthy is that a trustee may not deal with the headache of liquidating a foreign property even if he/she determined that the property does belong to you. If the property is worth a significant amount and there is little support to show that it does not belong to you (even though title was under your name), you just might not be a good candidate for bankruptcy at this time. I suggest consulting with a local attorney to evaluate your options.
Your best and safest course of action is to always disclose truthfully and honestly. If the title was under your name for only 2 months by mistake, and if you are not the owner, then you probably have very little to worry about.
You should definitely retain an experienced bankruptcy attorney to assist you on this matter.