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NSSDC Deep Impact Page NSSDC Deep Impact Page- Spacecraft and mission profile from the National Space Science Data Center. Michael A'Hearn Michael A'Hearn- Principle Investigator of the Deep Impact mission. Provides scientific objectives and data of the mission. Cometography.com: 9P/Tempel 1 Cometography.com: 9P/Tempel 1- History of 9P/Tempel 1, the Deep Impact target.