| ISS Expedition 23 | |
| Insignia: | ISS Expedition 23 Patch.svg |
| Insignia Caption: | Expedition 23 mission patch |
| Mission Type: | ISS Expedition |
| Mission Duration: | 76 days, 16 hours, 1 minute |
| Crew Size: | 6 |
| Crew Members: | Expedition 22/23: Oleg Kotov Soichi Noguchi Timothy Creamer Expedition 23/24: Aleksandr Skvortsov Mikhail Korniyenko Tracy Caldwell Dyson |
| Crew Photo: | Expedition 23 crew members.jpg |
| Crew Photo Caption: | (l-r) Korniyenko, Caldwell Dyson, Skvortsov, Kotov, Creamer and Noguchi |
| Space Station: | International Space Station |
| Start Date: | UTC |
| End Date: | UTC |
| Departure Craft: | Soyuz TMA-17 Soyuz TMA-18 |
| Previous Mission: | Expedition 22 |
| Next Mission: | Expedition 24 |
| Programme: | ISS expeditions |
Expedition 23 (Russian: МКС-23) was the 23rd long-duration mission to the International Space Station (ISS). Expedition 23 began with the Soyuz TMA-16 undocking on 18 March 2010. Shortly thereafter cosmonauts Aleksandr Skvortsov and Mikhail Korniyenko and astronaut Tracy Caldwell Dyson arrived at the Space Station on Soyuz TMA-18 on 4 April 2010.[1] The Soyuz spacecraft lifted off from the Baikonur Cosmodrome at 00:04 EST on 2 April 2010.[2]
| Position | First part (March 2010 to April 2010) | Second part (April 2010 to June 2010) |
|---|---|---|
| Commander |  Oleg Kotov, RSASecond spaceflight | |
| Flight Engineer 1 |  Soichi Noguchi, JAXASecond spaceflight | |
| Flight Engineer 2 |  Timothy Creamer, NASAOnly spaceflight | |
| Flight Engineer 3 | Aleksandr Skvortsov, RSA First spaceflight | |
| Flight Engineer 4 | Mikhail Korniyenko, RSA First spaceflight | |
| Flight Engineer 5 | Tracy Caldwell Dyson, NASA Second spaceflight | |
Three Russian cosmonauts, two American and one Japanese astronauts made up the Expedition 23 crew. It was the first ISS crew to include three Russians at once.[4] The Expedition 23 crew continued outfitting the newest modules of the nearly completed space station. The crew welcomed the shuttle flight STS-131 in April 2010. The Expedition 23 crew also saw the arrival of the Rasvet Russian docking module (MRM1) aboard on STS-132, which launched on 14 May 2010.