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Intuitive Machines’ Moon lander Odysseus reaches lunar orbit – Spaceflight Now

February 21, 2024
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Intuitive Machines’ Moon lander Odysseus reaches lunar orbit – Spaceflight Now
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A picture of Intuitive Machines’ Nova-C lander named ‘Odysseus’ captured by one of many spacecraft’s onboard cameras. Picture: Intuitive Machines

Reaching a profitable lunar touchdown turns into more and more extra tangible for the crew at Intuitive Machines with every passing day since launch. On Wednesday, the Houston-based firm introduced that it was in a position to place its robotic lunar lander, named Odysseus, right into a 92 km round orbit across the Moon, clearing the way in which for a touchdown try on Thursday.

In a social media submit, Intuitive Machines stated the lander’s primary engine burned for 408 seconds to finish the maneuver to enter orbit.

“Preliminary knowledge signifies the 800 [meters per second] burn was accomplished inside 2 m/s accuracy,” the corporate acknowledged. “Over the subsequent day, whereas the lander stays in lunar orbit, flight controllers will analyze the whole flight knowledge and transmit imagery of the Moon.”

The mission so far helps to show out the viability of a propulsion system powered by a mixture of liquid oxygen and liquid methane. Trent Martin, the vice chairman of House Techniques for Intuitive Machines, stated IM selected this propellant combination for its primary engine as a result of the corporate believes it’s “the way forward for this know-how.”

“The second cause we selected it’s as a result of we will take a look at it so simply. We take a look at it in our flame vary in Houston commonly. We’ve performed over 150 rocket fires on a number of iterations of this engine,” Martin stated within the run-up to the Feb. 15 launch. “We’ve taken the engine that’s sitting on that spacecraft, with that spacecraft, and fired it as a take a look at hearth to show that that engine will mild on the car.”

Martin and the crew have been in a position to give it a great in-space take a look at once they carried out a checkout burn referred to as the “commissioning maneuver” (CM). That was a 21-second, full-thrust firing of the primary engine on Feb. 16.

Initially, the CM was set to happen about 18 hours after launch, nonetheless, IM determined to delay that burn. It stated the flight groups “skilled intermittent uplink and downlink knowledge communications between Nova-C and the bottom stations, doubtlessly impacting our means to gather the essential info required to help the CM burn and follow-on efficiency evaluation.”

Martin stated previous to the IM-1 launch that getting by this milestone could be an enormous sigh of reduction.

“It takes the stress stage down a little bit bit. It brings the likelihood of success up a little bit bit,” Martin stated.

Odysseus accomplished its scheduled 408-second primary engine lunar orbit insertion burn and is at present in a 92 km round lunar orbit. Preliminary knowledge signifies the 800 m/s burn was accomplished inside 2 m/s accuracy. 🧵1/4 (21FEB2024 0920 CST) pic.twitter.com/ZoFStQD3cX

— Intuitive Machines (@Int_Machines) February 21, 2024

Second of reality

The most important take a look at for the touchdown is arising on Thursday when IM flight groups command Odysseus to exit its round lunar orbit and make its touchdown try. Martin stated the lander’s engine went by intensive throttle testing to verify it was prepared for the massive day.

“That’s extraordinarily vital as a result of as you go to land on the floor of the Moon, you’re going to lose two-thirds of the mass that you simply began with, you’re going to lose it as you burn it up,” Martin defined. “So, you have got to have the ability to throttle again that engine to a a lot decrease stage than the one hundred pc that you simply began with.

“However with the ability to take that engine and run it that whole time implies that you by no means flip your engine off. So that you by no means have that worry that ‘is it going to mild that subsequent time?’ as a result of it’s lit and it stays lit all the way in which to the floor. And that’s what makes the know-how that we’re flying totally different than a few of our rivals have.”

Intuitive Machines performing a firing take a look at of its the 900 lbf thrust class VR900 engine, which is able to energy the Nova-C lander. Picture: Intuitive Machines

That closing burn is not going to solely decelerate Odysseus to arrange it for touchdown, however groups will even reorient the spacecraft to shift from a considerably horizontal place right into a vertical one for descent.

“We’ll carry out a descent orbit insertion the place our terrain relative navigation machine will assist us carry out our powered descent initiation, a pitch over of our primary engine the place our primary engine will hearth as we do our hazard detection avoidance and vertical descent, terminal descent and touchdown on the Moon,” Martin defined in a pre-launch press convention.

He stated that the autonomous touchdown sequence and the descent orbital insertion (DOI) happens about an hour earlier than the touchdown. Landing at Malapert A, a crater about 10 levels from Moon’s south pole, is scheduled for five:49 p.m. EST (2249 UTC) on Thursday, Feb. 22.

As soon as on the lunar floor, Martin stated they count on Odysseus to function for seven days earlier than lunar night time arrives and the lander loses energy as it’s enveloped in chilly darkness.

Shot on aim

This touchdown try marks an enormous subsequent step for NASA’s Business Lunar Payload Companies (CLPS) program. The company paid slightly below $118 million for IM to fly six of its science devices to the Moon’s floor. NASA spent beneath $11 million to develop and construct them previous to their integration on the lander.

One of many instruments, the Radio Frequency Mass Gauge (RFMG), has been working alongside the flight path to the Moon to evaluate the propellant ranges throughout the lander. Joel Kearns, the deputy affiliate administrator for NASA’s Science Mission Directorate, stated it is going to be vital to discover ways to monitor gas ranges for future deep area missions.

“While you’re simply up in area and microgravity, if you’re not propulsively thrusting, the liquid gas and oxidizer doesn’t essentially go to the underside of the tank the place it will on a automotive, the place you could possibly simply pull it into the engine,” Kearns stated. “You need to discover a solution to get it there and you need to discover a solution to know the way a lot do you have got left based mostly on what you utilize, different than simply measuring how a lot you pull out versus how a lot you place in it initially.”

An infographic of the flightpath for Intuitive Machines’ Nova-C lander. Graphic: Intuitive Machines

The IM-1 mission is the second CLPS enterprise trying Moon touchdown up to now. Final month, Astrobotic’s Peregrine lunar lander failed to achieve the Moon after it encountered a difficulty with its propulsion system.

Each Astrobotic and IM produce other CLPS missions deliberate for later this 12 months. Martin stated they’re at present working with NASA to find out the exact touchdown location for his or her subsequent mission: IM-2.

“We’re touchdown most likely on the Shackleton Connecting Ridge, which is true, as shut as you will get to the South Pole with out touchdown proper on the Shackleton Rim, which might be actually troublesome to land on,” Martin stated. “There are factors on that ridge the place you get loads of mild, however perhaps the subsequent 12 months, you don’t get mild in that very same spot, so you need to transfer a pair hundred meters this manner or a pair hundred meters that method.

“So, we’ve been attempting to barter on that precise website. As soon as we get that, then we will choose the touchdown dates and occasions. Our aim is fourth quarter of this 12 months for that subsequent mission after which the follow-on mission will observe that, based mostly on that second one getting in fourth quarter of this 12 months.”

That mission will characteristic a partnership with Nokia, which is able to debut what it calls “the primary mobile community on the Moon” as a part of NASA’s Tipping Level initiative.

A render of the lander that might be used on Intuitive Machines’ IM-2 mission. Nokia’s LTE/4G community might be built-in into each the lander and a Lunar Outpost MAPP rover. Graphic: Intuitive Machines





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