What are the qualifications to be a supreme court Justice listed in the constitution?

There are no constitutional requirements for becoming a US Supreme Court justice; however, the President usually considers the recommendation and evaluation of the American Bar Association's Standing Committee on the Federal Judiciary. The ABA lists the following suggested minimum criteria for nomination to the US Supreme Court:

1. Member in good standing in the state bar for at least five years
2. Practicing trial attorney and/or trial judge for at least 12 years
3. Competent citizen of good character, integrity, reason, intelligence, and judgment
4. Distinguished accomplishments
5. Required to be legal scholars

To read about practical considerations, see Related Questions, below.