Complete Timeline of the Artemis II Mission: Download the Calendar
Artemis II Mission Milestones: Minute by Minute
❄️ Propellant Load
Cryogenic liquid oxygen (LOX) and liquid hydrogen (LH2) loading begins in the SLS core stage.
🚶♂️ Crew Walkout
Astronauts exit the O&C building and board the Astrovan transport vehicles to the pad.
🧑🚀 Capsule Ingress
The crew arrives at the "White Room" on the launch tower and begins boarding Orion.
🚪 Hatch Closure
Orion's side hatch is closed and sealed. Leak checks are underway.
⏱️ Terminal Countdown
The Launch Director gives the final "GO". Automated countdown initiates.
💻 Auto Sequence Hand-off
Ground systems hand off control to SLS flight computers. Ignition sequence begins.
🚀 Liftoff (Ascent)
RS-25 engines and solid boosters come to life. Official start of the MET clock.
🌬️ Cabin Depress (DFTO 3, 2)
Spacesuit seal test. Cabin pressure is intentionally reduced.
🔥 Perigee Raise Maneuver (ICPS PRM)
The upper stage fires engines to stabilize initial orbit 50 minutes into flight.
💻 Pre ARB C/Os
Preliminary systems checkouts prior to the apogee raise maneuver.
🔥 Apogee Raise Burn (ARB TIG)
Burn scheduled at 0/01:47 to elongate the orbit elliptically to gain altitude.
🧑🚀 Doff Survival Suits (OCSS)
Astronauts take off the heavy orange Orion Crew Survival System suits.
🔗 Orion/ICPS Spring Sep
Orion spacecraft physically disconnects from the upper stage via springs at 3 hours 23 minutes.
🛰️ Prox Ops Demo (Orion USS)
At 0/04:51, astronauts test manual controls flying in proximity to the discarded stage.
🗑️ ICPS Disposal Burn
The ICPS stage fires its engine at 0/05:02 to move to a safe graveyard orbit.
☀️ Solar Panel Deploy (SPL)
At 0/05:27, the European Service Module deploys its four solar arrays.
📷 Dock Cam Bearing
Optical camera bearing alignment scheduled at 0/06:00.
🍲 Cabin Config
Organization of supplies inside the capsule.
🎙️ PAD / PMC Checks
Private medical conference (PMC) and Preliminary Advisory Data review.
💤 First Sleep Cycle (4 hrs)
Brief 4-hour crew rest after the launch day.
📡 OpComm Activation
Initial activation of the laser optical communications system at 0/10:06.
🔥 Orion Perigee Raise Burn (PRB)
Orion fires its main engine at 0/13:30 to adjust final orbit before jumping to the Moon.
🔭 OpNav C/O
Optical navigation system checkouts at 0/14:15.
💤 Second Sleep (4.5 hrs)
Main 4.5-hour sleep cycle to prepare for lunar injection.
📞 TLI Conf (Go/No-Go)
Critical conference to authorize leaving Earth orbit. This stage is crucial to ensure all systems are ready for the jump to the Moon.
💪 Exercise Test
Test of the cabin's resistive exercise equipment.
🌬️ ECLSS CO2 Monitor DFTO
Flight test of the life support system's carbon dioxide monitor.
🛠️ Asc Bracket Uninstall
Uninstalling the docking camera and ascent brackets to free up space.
🚀 Trans-Lunar Injection (Orion TLI)
Main burn at 01/01:08:42. The ship leaves Earth heading for the Moon.
🍲 Meal
Meal routine for the crew.
🎙️ PAO Event
Public Affairs Office connection.
👀 Window Inspect
Detailed visual inspection of capsule windows.
🛠️ Dual Cam Bracket Install
Installation of the dual camera bracket for deep space operations.
💤 Deep Space Sleep (8.5 hrs)
Standard 8.5-hour rest cycle.
🔍 Thermal Inspection (CM/SM Survey)
Use of cameras at 01/14:00 to scan the heat shield for damage.
📡 OpCom ANU Demo
Advanced link demonstration of the optical communications system.
🛠️ Outbound Correction (OTC-1)
First Outbound Trajectory Correction burn scheduled at 02/01:08:42.
🩺 CPR Demo
Astronauts perform a Cardiopulmonary Resuscitation (CPR) demo in microgravity.
📡 SAT Mode Test
Test of the satellite communications mode.
⚕️ Med Kit
Review of the onboard medical kit.
🌙 Lunar Cab
Cabin configuration for lunar proximity operations.
📞 DSN Emergency Comms
Emergency link test (EMER Comm DFTO-EM2-22) with the Deep Space Network.
🎙️ CSA PAO Event
Exclusive link with the Canadian Space Agency (CSA).
📷 Dock Cam Misalign Test
Test DFTO-EM2-03 forcing a virtual misalignment of the optical camera.
💤 Sleep Cycle (FD03)
8.5 hours rest.
🛠️ Outbound Correction (OTC-2)
Second trajectory correction scheduled at 3/01:08:42.
🧪 Min ECLSS DFTO
Minimum environmental systems test (DFTO EM2-18).
🎧 Start 24h Acoustic DFTO
Starts a continuous ambient noise measurement test (EM2-7).
📷 Dock Cam & Bracket Install
Installation of additional optical tools.
🧭 NAV FTO
Navigation flight objectives test at 03/07:00 (EM2-223).
💤 Early Sleep Cycle
8.5-hour rest shifted 45 minutes earlier in preparation for the Moon.
🛠️ OTC-3
Third and final powered correction (4/04:29:52) before lunar influence.
🌑 Lunar SOI Entry
Orion crosses the Moon's gravitational boundary at 4/06:38.
🎧 End 24h Acoustic DFTO
24-hour ambient recording ends.
🌬️ Vent to 10.2 psi
Cabin pressure is equalized to reduced levels.
📷 Dock Cam Misalign Test
Test DFTO-EM2-03 prior to approaching the lunar surface.
💤 Sleep Cycle (Pre-flyby)
Rest shifted 1 hour earlier; the last before the encounter.
🌕 Lunar Close Approach
Closest point on the far side of the Moon at 5/00:29:59.
🌌 Max Earth Distance
The furthest point from Earth at 5/00:35.
🏆 Apollo Record
The crew breaks the historical distance record.
🔭 Lunar Obs
Visual observations of the Moon's surface following the flyby.
🔍 Post-Lunar Survey
External review of the heat shield at 05/12:30.
🌍 Lunar SOI Exit
Exit from the Moon's gravitational influence at 5/18:53.
💤 Deep Sleep (9.5 hrs)
Extended 9.5-hour sleep shift pushed 1 hour later.
🛠️ Return Trajectory Correction RTC-1
First Return Trajectory Correction burn scheduled at 6/01:29:52.
📷 Dock Cam WW Dump
Download of data captured by flight objectives (Dock Cam WW Dump FTO).
📷 Dock Cam Misalign
Continuation of misalignment tests on the return journey.
☢️ Rad Shelter Demo
Test construction of the solar storm radiation shelter using internal storage.
💻 FCS Checkouts
Tests of the Flight Control System (FCS) computers at 7/17:30.
📊 Modal Survey DFTO
Inspections of structural dynamics and vibrations of the crew module (EM2-27).
💧 Urine Venting Test
Expulsion test into deep space (DFTO EM2-26).
🌬️ Repress to 14.7 psi
Restoration of cabin pressure to standard levels.
🧑🚀 Suit Up (OIG Don)
Astronauts don orange survival suits preparing for landing.
🛠️ Return Trajectory Correction RTC-2
Fine tuning scheduled at 8/04:29:10 to secure the atmospheric corridor.
🎒 Entry Stow
Final stowage of all loose cabin items.
🛠️ Return Trajectory Correction RTC-3
Final ballistic adjustment straight towards the Pacific Ocean at 8/20:29:10.
🔗 Module Separation (CM/SM Sep)
The European Service Module is discarded at 09/01:09 to burn up in the atmosphere.
💧 +X Leak Detection
Final leak detection test (DFTO) prior to atmospheric entry.
🔥 Entry Interface
Capsule hits the atmosphere at Mach 32 at 09/01:29.
🌊 Splashdown
Splashdown in the waters of the Pacific Ocean at 09/01:42:48. Mission accomplished!
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