January 9th, 2020 marks 300 days aboard the International Space Station for NASA Astronaut Christina Koch.
In December, Christina Koch set a record for the longest single spaceflight by a woman, eclipsing the record of 288 days set by former NASA astronaut Peggy Whitson in 2016-17. Koch will have been part of three expeditions 59, 60 and 61 during her first spaceflight. Her mission is planned to be just shy of the longest spaceflight by a NASA astronaut 340 days, set by former NASA astronaut Scot Kelly during his one-year mission in 2015-16.
NASA has gathered vast amounts of data on astronaut health and performance over the past 50 years and has focused recently on extended durations up to one year with the dedicated mission of Scott Kelly and extended mission of Peggy Whitson. These opportunities have also demonstrated that there is a significant degree of variability in human response to spaceflight and its important to determine the acceptable degree of change for both men and women.