Artemis 1, officially Artemis I, is an ongoing uncrewed Moon-orbiting mission, the first spaceflight in NASA's Artemis program, and the first flight of the agency's Space Launch System (SLS) rocket and the complete Orion spacecraft. Artemis 1 was successfully launched from Kennedy Space Center on 16 November 2022 at 1:47:44 am EST (6:47:44 UTC).
Formerly known as Exploration Mission-1 (EM-1),
the mission was renamed following the creation of the Artemis program. The
mission lifted off from Launch Complex 39B at the Kennedy Space Center aboard
the Space Launch System rocket. The Orion spacecraft has been launched on a
mission of between 26 and 42 days, with at least 6 of those days in a distant
retrograde orbit around the Moon. After
reaching Earth orbit and performing a trans-lunar injection (burn to the Moon),
the mission will deploy ten CubeSat satellites. The Orion spacecraft will later
enter a distant retrograde orbit for six days. The Orion spacecraft will then
return and reenter the Earth's atmosphere, protected by its heat shield, and
splash down in the Pacific Ocean. The mission will certify Orion and the Space
Launch System for crewed flights beginning with Artemis 2. After the Artemis 1 mission, Artemis 2 will
perform a crewed lunar flyby and Artemis 3 will perform a crewed lunar landing,
five decades after the last lunar Apollo mission.
The Orion spacecraft for Artemis 1 was stacked on 20
October 2021, marking the first time a super-heavy-lift vehicle has been
stacked inside NASA's Vehicle Assembly Building (VAB) since the final Saturn V in
1973. On 17 August 2022, the fully stacked vehicle was rolled out for launch,
after a series of delays caused by difficulties in pre-flight testing. The
first two launch attempts were canceled, due to faulty reading on 29 August
2022, and a hydrogen leak during fueling on 3 September 2022, respectively.
Planned Mission Profile
Artemis 1 was launched on the Block 1 variant of the
Space Launch System. The Block 1 vehicle
consists of a core stage, two five-segment solid rocket boosters (SRBs), and an
upper stage. The core stage uses four RS-25D engines, all of which have
previously flown on Space Shuttle missions. The core and boosters together
produce 39,000 kN (8,800,000 lb) of thrust at liftoff. The upper
stage, known as the Interim Cryogenic Propulsion Stage (ICPS), is based on the Delta
Cryogenic Second Stage and is powered by a single RL10B-2 engine on the Artemis
1 mission.
Once in orbit, the ICPS fired its engine to perform
a trans-lunar injection (TLI) burn, which placed the Orion spacecraft and ten CubeSats
on a trajectory to the Moon. Orion then separated from the ICPS and continued
its coast into lunar space. Following Orion separation, the ICPS Stage Adapter
deployed ten CubeSats that will conduct scientific research and perform
technology demonstrations.
The Orion spacecraft will spend approximately three
weeks in space, including six days in a distant retrograde orbit (DRO) around
the Moon.
https://en.wikipedia.org/wiki/Artemis_1
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