The launch is planned for 5:37 p.m. EDT from Launch Complex 39A. Should bad weather set in, controllers could try again the next day.
If the weather does not cooperate, the mission could be delayed until the end of summer or beyond, NASA flight controllers said during a readiness review.
That's because the launch schedule space is getting crowded, and other missions have higher priorities, officials said.
Four astronauts under the auspices of Houston-based Axiom Space are scheduled conduct eight days of commercial and educational work aboard the space station, including technological demonstrations and production of innovative materials, as well as creating alternative biological substances.
"These missions are very important to us at NASA as we try to open up space, low Earth orbit especially, to a greater cross-section of society," said former NASA astronaut Ken Bowersox, now the space agency's associate administrator for space operations.
Axiom envisions these activities as precursors to future commercial missions performed aboard a private space station the company envisions launching in late-2025, cooperating with academic and industrial partners. The work will be done in low-Earth orbit.
"There is a lot to be done there, and we think that the economy in low-Earth orbit will continue to expand," he said.
"Someday NASA will be just a participant in that economy, buying services from private industry ... as the agency goes out and explores on the cutting edge."
The four-member crew consists of former NASA astronaut Peggy Whitson, commander, and pilot John Shoffner, a private citizen and aviator with a deep passion for space exploration and adventure. Over 25 years, Shoffner has logged 8,500 hours of flying time.
Two citizens of Saudi Arabia are joining as mission specialists: Ali al-Qarni and Rayyanah Barnawi, who will become the first Saudi woman to fly into space. Both are members of the Saudi national program, and they will be flying as part of an agreement between Axiom Space and the kingdom.
This second mission by Axiom Space and private astronauts will help expand space access worldwide, Michael Suffredini, the Axiom president and CEO, has said.
He has described the mission as a "step closer toward building a private space station in low-Earth orbit, making it possible to capitalize on the legacy and achievements of the International Space Station, "leveraging the benefits of microgravity to better life on Earth."
|Subscribe Free To Our Daily Newsletters
Cosmonauts wrap up 5-hour ISS spacewalk
Axiom Space's second crewed mission gets green light
Ax-2 crew carrying personal, cultural mementoes on launch to ISS
Research announcement for technology development leveraging ISS is open for concepts
Virgin Orbit receives more than 30 indications of interest under court approved bid procedures
Wenchang Spacecraft Launch Site can launch new-generation rockets
For 191st time, SpaceX booster successfully returns after launch
Momentus signs launch package with SpaceX
These sounds are out of this world
Another beautiful hole on Mars: Sols 3825-3826
Perseverance images may show record of wild Martian river
OU space scientists provide new insight into the evolution of Mars' atmosphere
"Tianzhou Express" is online again, with five highlights
Tianzhou 6 docks with Tiangong space station
China's cargo craft Tianzhou 6 ready for launch
Tianzhou-5 cargo craft separates from China's space station
What if all telecommunication satellites stopped?
Toshiba posts 35% decline in full-year net profit
Sidus Space selected by OneWeb to manufacture satellite hardware
Sidus Space expands global ground site network with new ATLAS contract
Arianespace to launch the first active debris removal ClearSpace mission with Vega C
Juice's RIME antenna breaks free
New deal inked to space test meta-optical surfaces
Space Forge enables reusable satellites with new way of returning from space to Earth
Astronomers observe the first radiation belt seen outside of our solar system
Astronomers spot benzene in planet-forming disk around star for first time
Researchers uncover how primordial proteins formed on prebiotic earth
Bacteria survive on radioactive elements
Pioneer 11, launched 50 years ago, helped solve mysteries of the universe
NASA's Juno mission closing in on Io
NASA: Up to 4 of Uranus' moons could have water
New video series captures team working on NASA's Europa Clipper
|Subscribe Free To Our Daily Newsletters