What is Artemis doing now? – Part 2 – Times of Science

Unexpected data loss during communication link establishment

On the eighth day of the mission, a sudden crisis struck. Johnson Space Center NASA’s Mission Control Center was trying to establish a communication link between the Orion capsule and the Deep Space Network overnight, and at approximately 12:09 AM, NASA’s Mission Control Center unexpectedly lost communication data with the capsule for 47 minutes has been confirmed. that it has been

The configuration of the communication link was successful, but the Artemis team is still digging into the cause of the communication failure. Fortunately, the Orion capsule was not affected, and the probe is still operating normally.

The eighth day after launch is the day when the Orion capsule begins to prepare to enter a retrograde orbit relative to the moon’s orbit around the earth, and from now on, it will travel further from the earth The Orion capsule was orbiting the Moon at a high altitude from the Moon’s surface, and began to leave the Moon’s gravitational pull at 9:49 PM local time (EST) on Tuesday, November 22. (The first phase of a change from a green arrow to a gray arrow on Artemis mission trajectory table 1)

© Artemis 1/NASA

As the Orion capsule begins its journey into distant retrograde orbit, engineers on the Artemis team prepare for “prop sloshing” for when the mission is suspended or inactive. the liquid storage tank installed on the movements of the floating body was completed)”.

In the above test, it checks whether the reaction control system drive is performed normally in preparation for fluid fluctuations in the propellant tank, and measures the effect when the Orion capsule’s drive sloshing is set in the opposite direction to the trajectory of the spacecraft. The above test will continue to be performed in the future, and it is expected that it will be possible to compare data in different situations. Additionally, fuel sloshing tests are quite difficult on Earth due to the effects of gravity. Therefore, it can be said that Artemis is the perfect place to perform the above test now that it is performing its journey.

As of Wednesday, November 23, the ninth day of the flight, a total of about 3,971 pounds (about 1,800 kg) of fuel had been used, about 147 pounds (about 66 kg) less than the pre-launch estimate. So, a total of more than 2,000 pounds (about 900 kg) of fuel remains. Shortly after 1:00 PM on the same day, the Orion capsule has traveled about 212,437 miles (about 340,000 km) since its launch from Earth, and has traveled more than 48,064 miles (about 77,000 km) from the Moon , traveling at 2,837 miles of the Moon. hour (about 4500 km/h) cruising

While the Orion capsule is moving into far back orbit, flight controllers have successfully completed the third flight test of the tracker development through a navigation instrument, and the fourth test is planned for the next day. The Orion probe successfully completed its sixth external trajectory correction burn at 3:52 PM the same day.

Orion Probe – Finally enters Retro Orbit

On the tenth day of the flight, the Orion capsule began to enter a far back orbit. (On the Artemis 1 mission trajectory table, where the green arrow trajectory ends and the first gray trajectory begins) At 4:52 pm on November 24, the flight control team turned up in the White Flight Control Room at the Space Center Johnson’s Orbital Propulsion System engines on for one minute It launched for 28 seconds, moving the Orion capsule at 363 feet per second (about 0.11 km), completing a successful transition to backward orbit.

Now, the Orion capsule from the Artemis 1 mission will travel the farthest distance from Earth among lunar missions to date. (The part to the right of the gray arrow in the Artemis 1 mission trajectory chart) During the above distance, the flight control team will constantly monitor the core systems of the Orion capsule and check if it can adapt normally to the deep space environment.

The Orion capsule entered a retrograde orbit rather high and far from the orbit of the moon. Therefore, the orbit of the Orion probe is rather long, taking about six days to complete half an orbit around the Moon. On the 14th day after the flight (around 28 November), the Orion capsule will once again fly close to the moon and begin its journey back to Earth using the moon’s gravity. (The part where the gray arrow changes to the blue arrow on the Artemis 1 mission trajectory table)

The Orion probe travels in a far back orbit around the Moon. The moon was photographed with a camera mounted on the solar panels of the Orion capsule © Artemis/NASA

On Saturday, November 26, the Orion capsule will break the record for the furthest distance traveled from Earth. (The rightmost part of the gray arrow on the Artemis 1 mission path chart) The farthest distance ever recorded from Earth is Apollo 13’s 248,655 miles (about 400,000 km).

The most distant lunar probe in history

On Friday, November 25, on day 11 of the Artemis 1 mission, the Orion capsule continues its journey after entering a distant retrograde orbit. Of course, I didn’t forget to take pictures of the ground. Orion will remain in its highest retrograde orbit for six days before leaving lunar orbit and preparing to return to Earth. FYI, the Orion capsule is scheduled to arrive in the Pacific Ocean on Sunday, December 11th.

On Friday, November 25, on day 11 of the Artemis 1 mission, the Orion capsule continues its journey after entering a distant retrograde orbit. Again, a clear picture of the Earth. © Artemis/NASA

On Saturday, November 26, the 12th day of the mission, it finally broke the previous record by being the farthest away from Earth among lunar missions sent by mankind. The previous record was held by Apollo 13, which had reached a distance of 248,655 miles (about 400,171 km) from Earth during its mission. The Orion capsule will continue to move away from Earth. On Monday, November 28, it will be more than 270,000 miles (434,522 km) from Earth.

Engineers on the Artemis team completed the first orbital maintenance burst by launching auxiliary thrusters mounted on the Orion capsule’s service module at 3:52 PM EST on November 26. It propels the spacecraft at about 0.47 feet per second (approx. 15 cm) and will continue to refine and guide Orion into orbit around the moon as it continues its planned maintenance orbital.

Flight Day 12 – Orion Star Trackers Test Response Control Thruster

On day 12 of the Artemis 1 mission, the Orion capsule is still traveling in orbit back from the Moon and undergoing another planned test. Specifically, the Artemis team is tracking the star Orion기(Orion’s Star Ochers)and reaction control thruster flight tests began. Engineers on the Artemis team unveiled part of the rover to the sun and tested the stellar tracker, which is part of the guidance, navigation and control systems, the Orion inertial measurement unit and the reactive control drive system.

A star tracker is a navigational instrument that measures the positions of stars to help searchers determine direction, and an inertial measurement device consists of three devices called gyros that are used to measure the speed of rotation of the spacecraft’s body and the spacecraft’s acceleration. n include three speeds used. to measure

The Orion capsule of the Artemis mission takes pictures of the Earth and the Moon from the farthest distance from Earth © Artemis/NASA

The aim of the above test is to efficiently model the jet thruster and the jet response control system that will be used in the Artemis II crewed mission in the Artemis 2 mission. As of 4:30 pm on November 27, EST, the Orion capsule about 425,000 km from the Earth and 73,000 km from the Moon, and it cruises at a speed of 2,816 km/h.

Browse Pictures Related to Artemis Mission 1 Johnson Space Center Flickr

Where is the Orion capsule from the Artemis 1 mission now? – Check real-time tracking

Guide to the series “Can Humanity Go to the Moon Again?”

Relates to the mission of Artemis
Can humans ever go to the moon again? – About the Artemis 1 mission
The most powerful rocket in existence – Space Launch System (SLS)
What is Artemis doing now? – Chapter 1
What is Artemis doing now? – Chapter 2

Related to Artemis Mission Launch
The launch of the Artemis 1 mission was delayed due to engine failure
The launch of the Artemis 1 mission has been delayed again

The Artemis 1 mission is scheduled to launch on November 16
Artemis 1 was successfully launched at last


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