NASA Artemis I – Dia de Voo 24: Orion Spacecraft Volta para Casa


Artemis I Equipe de Recuperação Executa Procedimentos de Operações de Voo de Prática a Bordo do USS Portland

Os membros da NASA e do DoD da equipe de recuperação Artemis I executam procedimentos de operações de voo prático a bordo do USS Portland (LPD 27). A equipe está no mar antes do mergulho do Orion em 11 de dezembro no Oceano Pacífico. Crédito: NASA

No dia 24 de voo da missão Artemis I,[{” attribute=””>NASA teams in Mission Control Houston conducted spacecraft system checks ahead of Orion’s planned splashdown on December 11. Meanwhile, the Exploration Ground Systems recovery team made its way toward the landing area off Mexico’s Baja Coast near Guadalupe Island in the Pacific Ocean.

As planned, flight controllers activated the crew module reaction control system heater and conducted a hot-fire test for each thruster. The five pulses for each thruster lasted 75 milliseconds each, and were conducted in opposing pairs to minimize attitude changes during the test. Thrust for the crew module propulsion system is generated from 12 monopropellant MR-104G engines. These engines are a variant of MR-104 thrusters, which have been used in other NASA spacecraft, including the interplanetary Voyagers 1 and 2.

NASA Artemis Flight Day 22 Orion Thrusters

The engines on Orion’s service module are prominently featured in this image from flight day 22 of the Artemis I mission. The largest is the orbital maneuvering system engine, surrounded by eight smaller auxiliary thrusters. Credit: NASA

Thus far, approximately 12,100 pounds of propellant have been used, which is around 240 pounds less than was estimated prelaunch. This leaves a margin of 2,230 pounds over what is planned for use, 324 pounds more than prelaunch expectations.

On its way back to Earth, Orion will pass through a period of intense radiation as it travels through the Van Allen Belts that contain space radiation trapped around Earth by the planet’s magnetosphere. Outside the protection of Earth’s magnetic field, the deep space radiation environment includes energetic particles produced by the Sun during solar flares as well as particles from cosmic rays that come from outside the galaxy.

Orion was designed from the start to ensure the reliability of essential spacecraft systems during potential radiation events and can become a makeshift storm shelter when crew members use shielding materials to form a barrier against solar energetic particles.

NASA Artemis Flight Day 24 Orion Farther From the Moon

Orion’s distance from the Moon continues to increase on flight day 24 of the Artemis I mission as it heads back to Earth and a splashdown at 12:40 p.m. Sunday, December 11. When this photo was taken using a camera mounted on one of Orion’s four solar arrays, the spacecraft was over 200,000 miles away from our lunar neighbor. Credit: NASA

For the uncrewed Artemis I mission, Orion is carrying several instruments and experiments to better understand the environment future crews will experience and provide valuable information for engineers developing additional protective measures. There are active sensors connected to power that can send readings to Earth during the flight, as well as passive detectors that require no power source to collect radiation dose information that will be analyzed after the flight.

Commander Moonikin Campos is equipped with two radiation sensors, as well as a sensor under the headrest and another behind the seat to record acceleration and vibration throughout the mission. The seat is positioned in a recumbent, or laid-back, position with elevated feet, which will help maintain blood flow to the head for crew members on future missions during ascent and entry. The position also reduces the chance of injury by allowing the head and feet to be held securely during launch and landing, and by distributing forces across the entire torso during high acceleration and deceleration periods, such as splashdown.

A crew is expected to experience two-and-a-half times the force of gravity during ascent and four times the force of gravity at two different points during the planned reentry profile. Engineers will compare Artemis I flight data with previous ground-based vibration tests with the same manikin, and human subjects, to correlate performance prior to Artemis II.

In addition to the sensors on the manikin and seat, Campos is wearing a first-generation Orion Crew Survival System pressure suit – a spacesuit astronauts will wear during launch, entry, and other dynamic phases of their missions. Even though it’s primarily designed for launch and reentry, the Orion suit can keep astronauts alive if Orion were to lose cabin pressure during the journey out to the Moon, while adjusting orbits in Gateway, or on the way back home. Astronauts could survive inside the suit for up to six days as they make their way back to Earth. The outer cover layer is orange to make crew members easily visible in the ocean should they ever need to exit Orion without the assistance of recovery personnel, and the suit is equipped with several features for fit and function.

Shortly before 2:30 p.m. CST on December 9, Orion was traveling 171,500 miles (276,000 km) from Earth and 214,200 miles (344,700 km) from the Moon, cruising at 2,100 mph (3,400 km/h).

Artemis All Access – Episódio 6 Artemis All Access é a sua visão do que há de mais recente em Artemis I, as pessoas e a tecnologia por trás da missão e o que está por vir. Este teste de voo não tripulado ao redor da Lua abrirá o caminho para um teste de voo tripulado e uma futura exploração lunar humana como parte do Artemis. Crédito: NASA

Assista ao último episódio do Artemis All Access (vídeo incorporado acima) para ter uma ideia do status da missão mais recente e uma visão interna antes da aterrissagem.

A cobertura ao vivo da aterrissagem começará às 11h EST no domingo, 11 de dezembro. A aterrissagem está programada para as 12h39, e a cobertura continuará até a transferência da Orion do Controle da Missão em Houston para as equipes de recuperação dos Sistemas Terrestres de Exploração no Oceano Pacífico. A cobertura será ao vivo na NASA TV, o canal da agência local na rede Internete as aplicativo da NASA.

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