the patch, the mission number appeared in Roman numerals as Apollo XIII. It did not have to be modified after Swigert replaced Mattingly, as it is one of only two Apollo mission insigniathe other being Apollo 11not to include the names of the crew. It was designed by artist Lumen Martin Winter, who based it on a mural he had painted for the St. Regis Hotel in New York City. The mural was later purchased by actor Tom Hanks, who portrayed Lovell in the movie Apollo 13, and is now in the Captain James A. Lovell Federal Health Care Center in Illinois. The mission's motto was in Lovell's mind when he chose the call sign Aquarius for the lunar module, taken from Aquarius, the bringer of water. Some in the media erroneously reported that the call sign was taken from a song by that name from the musical Hair. The command module's call sign, Odyssey, was chosen not only for its Homeric association but to refer to the recent movie, 2001: A Space Odyssey, based on a short story by science fiction author Arthur C. Clarke. In his book, Lovell indicated he chose the name Odyssey because he liked the word and its definition: a long voyage with many changes of fortune. Space vehicle The Saturn V rocket used to carry Apollo 13 to the Moon was numbered SA-508, and was almost identical to those used on Apollo8 through 12. Including the spacecraft, the rocket weighed in at . The S-IC first stage's engines were rated to generate less total thrust than Apollo 12's, though they remained within specifications. To keep its liquid hydrogen propellent cold, the S-II second stage's cryogenic tanks were insulated; on earlier Apollo missions this came in the form of panels that were affixed, but beginning with Apollo 13, insulation was sprayed onto the exterior of the tanks. Extra propellant was carried as a test, since future J missions to the Moon would require more propellant for their heavier payloads. This made the vehicle the heaviest yet flown by NASA, and Apollo 13 was visibly slower to clear the launch tower than earlier missions. The Apollo 13 spacecraft consisted of Command Module 109 and Service Module 109 (together CSM-109), called Odyssey, and Lunar Module7 (LM-7), called Aquarius. Also considered part of the spacecraft was the launch escape system, which would propel the command module (CM) to