Information to be determined is in RED TEXT below.
Information that is subject to change is in GREEN TEXT below.
Last update of this page: January 29, 2025, 10:23 am ET
Payload Ferry Flights and ISS Crew Data
Ferry Vehicle to ISS: Dream Chaser Demo-1
Current Launch Date: May 21, 2025 (useful reference NASA Consolidated Launch Schedule at nasa.gov)
Crew: none
Launch Site: Launch Complex (LC) 39A, NASA Kennedy Space Center, FL
Berthing at ISS: 1 to 4 days after launch
Launch Date History:
Initial Launch Date: May 21, 2025
Ferry Vehicle for Return to Earth: Dream Chaser Demo-1
Crew: none
Unberth/Landing Date: TBD
Landing Site: splashdown off the Atlantic or Pacific coast
Payload Duration on ISS: nominally 4-6 weeks; expectation 4 weeks
Notable: visit the NASA ISS website for a comprehensive overview of ISS construction, on-orbit research, operations, crews, and multimedia galleries; read about the SpaceX Falcon 9 rocket and Dragon spacecraft
ISS Crew for SSEP Mission 19 Payload Operations: Expedition TBD (see Expeditions Schedule at nasa.gov) crew to be listed once closer to launch date
SSEP Mission 19 to ISS: Payload and Program Data
Payload Designation: SSEP21 – Endeavour, named for NASA’s Space Shuttle orbiter Endeavour, which carried the first SSEP payload of experiments on May 16, 2011. The flight was designated STS-134, was the final flight of Endeavour, and was second to last flight of the U.S. Space Shuttle Program. Watch the launch on the SSEP Launch and On-Orbit Operations History page. Starting with Mission 19 to ISS, SSEP experiment payloads are named for the orbiter vehicles from the NASA Space Shuttle Program. (For SSEP Mission 16-18, experiment payloads were named for NASA’s robotic lunar exploration programs in advance of the Apollo missions; for SSEP Missions 12 to 15, experiment payloads were named for NASA human spaceflight programs; for SSEP Missions 5 to 11, experiment payloads were named for Apollo Command Modules; prior to Mission 5, payloads were named for Apollo Lunar Modules.)
Number of Student Team Flight Experiments: 21
20 communities are participating in SSEP Mission 19 to ISS
21 flight experiments were selected, with 20 communities flying 1 experiment and 1 community flying 2 experiments
Payload: Suite of Fluids Mixing Enclosure (FME – Mark II) Mini-laboratories
Stowage: Nanoracks Express Rack in the Japanese Experiment Module (JEM; also nicknamed Kibo) on ISS
History:
The 21st SSEP flight opportunity—SSEP Mission 19 to the International Space Station—was announced by the National Center for Earth and Space Science Education (NCESSE) and the Arthur C. Clarke Institute for Space Education on February 28, 2024, with accompanying Video Clips describing SSEP by Center Director, Dr. Jeff Goldstein: Clip 1 (NASA), Clip 2 (NASA)
Current Status:
Flight experiments have been selected and teams are preparing for flight later this year.
A List of Important SSEP Mission 19 to ISS Subpages:
SSEP Mission 19 to ISS: Critical Timeline
SSEP Mission 19 to ISS: Mini-Laboratory Operation
SSEP Mission 19 to ISS: Mission Patch Art and Design Competition