NASA’s megarocket is ready for its first flight to the Moon: these are the dates

The various tests and launch timeline replays with padding of En général, un lanceur se compose de plusieurs étages (fusée gigogne ou composite).
Chaque étage comporte :• un ou deux réservoirs (carburant et comburant) ou…” data-url=”” data-more=”Lire la suite”>rocket launcher
SLS (WDR, wet test) they are complete. In a statement, the POT is pleased with the turn of events and expressed confidence that the giant launcher, built by Boeing, is ready for its test flight and Artemis I mission. Teams from Boeing and NASA will now proceed with launch preparations for this flight that will begin the missions of the Artemis lunar program which is to take the Americans back to the moon surface.

That said, a small hydrogen leak prevented NASA and Boeing from conducting tests until time T minus 9 seconds, just prior to firing of the main stage’s four RS-25 main engines. At most, the countdown stopped at T minus 29 seconds. Although the duration rehearsals didn’t go as far as program officials wanted, NASA and Boeing still said reception of the WDR had accomplished enough to move on to final launch preparations.

No release in the next few days

The SLS (Space Launch System), No several are in production, obviously not going to take off in the next few days. friday 1it is July, NASA will bring the launcher back to the assembly building (Vehicle Assembly Building or VAB) for a period of six to eight weeks where it will be prepared for its inaugural flight. NASA also needs to do various checks and repairs, including this hydrogen leak located at the bottom of the main stage.

Regarding the work to be done, NASA and Boeing are confident. The launcher will be ready to launch between August 23 and September 6. Yes this Fonction de la fenêtre
La fenêtre a plusieurs utilités : assurer une sortie en cas d’évacuation, un moyen de communication vers l’extérieur, l’aération d’une habitation…
Les…” data-image=”” data-url=”” data-more=”Lire la suite”>window
was missed, the next opportunity would occur between September 19 and October 4. The release date will not be known for several weeks. NASA does not have enough visibility into the duration of the work and the tasks to be performed on the SLS.

Artemis flight to the Moon: why launch dates are difficult to determine?

article of Remy Decourt published on 06/12/2022

Preparing for a new attempt to repeat the SLS launch chronology with filling of the SLS launcher (WDR, Wet Dress Rehearsal), NASA is also preparing the Artemis I mission that will take place during the maiden flight of the SLS. Artemis I, who was to pave the way for the return of the Americans to the Une lune avec un « L » minuscule est le satellite d’une planète. Par exemple Phobos et Deimos sont les deux lunes de la planète Mars.
La Lune
La Lune avec un « L » majuscule est l’unique satellite naturel de la Terre ; elle résulte sans doute d’une collision il y a 4,4…” data-image=”” data-url=”” data-more=”Lire la suite”>Moon
by 2028, it could launch during the summer. But on what date? Surprisingly, despite the Moon’s proximity to Earth, launch opportunities are not as plentiful as one might think. explanations.

If the second launch timeline replay attempt with SLS launcher padding (WDR, wet test) is going well, NASA and Boeing should then speed up preparation for the SLS’s maiden flight during the Artemis I mission on a date that has not yet been communicated. But finding a release date is a headache because at NASA must take into account several parameters.

A roller coaster around the moon

As a reminder, Artemis I will consist of an unmanned test flight around the Moon following a trajectory similar to that of the mission. Le programme spatial Apollo
Apollo est un programme spatial américain d’exploration humaine de la Lune décidé par le président américain John Fitzgerald Kennedy en 1961.
L’objectif de la…” data-image=”” data-url=”” data-more=”Lire la suite”>Apollo
8, using the gravity moon to gain speed and propel itself almost 70,000 kilometers beyond the Moon, almost half a million kilometers from Earth, farther than any human being has ever traveled. On his return trip, Orion will make a Overview from the Moon before returning to Earth. The mission will last approximately 20 days and will end with a dip in the Pacific Ocean without the service module, which will be separated from the vehicle and burned in theatmosphere.

The uncertainty about the launch date of this mission is not only explained by the completion date of the WDR tests and the green light for the use of the SLS. There are plenty of other parameters to consider. Indeed, surprisingly, despite the close Proximity of the Moon to the Earth.within the framework of this mission the launch opportunities are not as numerous as one might think.

These firing windows primarily explain the complex orbital mechanics involved in launching on a precise path to the Moon as the Earth rotates on its axis and the Moon orbits the Earth each month in its orbit. moon cycle. But not only.

Four main parameters that will determine the launch date

As expected, the launch date must take into account the position of the Moon so that the upper stage of the SLS launcher can program the Chaleur : la combustion, une réaction exothermique
Le combustible est oxydé et le comburant est réduit. Cette réaction…” data-image=”” data-url=”” data-more=”Lire la suite”>combustion
of translunar injection with sufficient performance to intercept the “ramp” to theorbit retrograde moon. In the future, this stage will be replaced by the EUS Upper Exploration Stage (upper stage of exploration) more powerful, which will allow almost daily or even daily launches to the Moon, depending on the desired orbit. Furthermore, the resulting trajectory for a given day must guarantee thatOrion doesn’t stay in the dark for more than 90 minutes at a time, so your solar panels can receive and convert La lumière blanche
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from the sun into electricity and that the spacecraft can maintain an optimal temperature range. Finally, the launch date must allow a return path that authorizes the entry technique, called by jump. This technique consists of a maneuver during which the spacecraft dives into the upper part of the Earth’s atmosphere and uses this atmosphere, as well as the porance from the capsule, to simultaneously slow down and exit the atmosphere, then return for the final descent and splashdown. This technique allows engineers to pinpoint the location of Orion’s splashdown and, in future missions, will help reduce aerodynamic failure loads experienced by aircraft. astronauts inside the ship and to keep the ship’s structural loads within design limits. Finally, the launch date should allow Orion to splash down during the day, to help recovery personnel locate, secure and recover the spacecraft in the Pacific Ocean.

Taking all of these parameters and constraints into account, NASA has identified and determined 73 possible launch dates between July 26 and December 23, 2022. This results in a schedule with approximately two weeks of launch possibilities, followed by two weeks with no chance of release.

Firing windows considered for Artemis 1

July 26 – August 10

  • 13 launch opportunities
  • No launch possibility on August 1, 2 and 6

August 23 – September 6

  • 12 launch opportunities
  • No possibility of launching on August 30 and 31 as well as on 1it is September.

September 20 – October 4

  • 14 launch opportunities
  • No chance of release on September 29.

October 17 – October 31

  • 11 launch opportunities
  • No launch possibility on October 24, 25, 26 and 28

November 12 – November 27

  • 12 launch opportunities
  • No launch possibility on November 20, 21 and 26

December 9 – December 23

  • 11 launch opportunities
  • No launch possibility on December 10, 14, 18 and 23

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