- 1/28/1951 - 1/31/2018
- Ukraine - Deceased
- National Space Agency of Ukraine
Leonid Kostyantynovych Kadenyuk (Ukrainian: Леонід Костянтинович Каденюк, 28 January 1951 – 31 January 2018) was the first astronaut of independent Ukraine. He flew on NASA's Space Shuttle Columbia in 1997 as part of the international mission STS-87.