Peregrine Mission One

From Wikipedia, the free encyclopedia
Peregrine Mission One
Peregrine ahead of launch
Mission typeLunar Landing, Surface operations (planned)
OperatorAstrobotic Technology
COSPAR ID2024-006A
Mission durationOne lunar day (14 Earth days) on the surface (planned)
Spacecraft properties
SpacecraftPeregrine
Launch mass1,283 kg (2,829 lb)
Start of mission
Launch date8 January 2024 07:18:38 UTC
RocketVulcan Centaur VC2S
Launch siteCape Canaveral SLC-41
Moon lander
Spacecraft componentPeregrine Lunar Lander
Landing dateFebruary 23, 2024 (planned)
Landing siteSinus Viscositatis (Bay of Stickiness, planned)
Mission Patch
Mission Patch  

Peregrine Mission One, or the Peregrine Lunar Lander flight 01, is a lunar lander built by Astrobotic Technology,[1] selected as a part of NASA's Commercial Lunar Payload Services (CLPS). It was launched January 8, 2024 at 2:18 am EST by United Launch Alliance (ULA) aboard a Vulcan Centaur. This was the first launch of the Vulcan Centaur.[2] The lander carries multiple payloads, with a total payload mass capacity of 90 kg.[3] It is the first US-built lunar lander to launch since the crewed Lunar Module from the Apollo program.

History[edit]

In July 2017, Astrobotic announced an agreement had been reached with United Launch Alliance (ULA) to launch their Peregrine lander aboard a Vulcan Centaur launch vehicle.[4] This first lunar lander mission, called Mission One, was initially planned to be launched in July 2021.[4][5]

By May 2019, Mission One had 14 commercial payloads, including small rovers from Hakuto, Team AngelicvM,[6] and a larger rover from the Carnegie Mellon University named Andy that has a mass of 33 kg (73 lb) and is 103 cm (41 in) tall.[7] A small rover, weighing 1.5 kg (3.3 lb), named Spacebit is included, and it moves on four legs.[8][9][10] It is a technological demonstrator and will travel a distance of at least 10 m (33 ft).[11] Other payloads aboard the lander include a library, in microprint on nickel, which will include Wikipedia contents and Long Now Foundation's Rosetta Project.[12][13]

On November 29, 2018, Astrobotic was made eligible to bid on NASA's Commercial Lunar Payload Services (CLPS) to deliver science and technology payloads to the Moon,[14] and in May 2019, it was awarded its first lander contract for NASA.[15][16] Therefore, in addition to the 14 commercial payloads, the lander will carry 14 NASA-sponsored payloads, for a total of 28.[17]

In June 2021, United Launch Alliance CEO Tory Bruno announced that the maiden flight of Vulcan Centaur, with Mission One aboard, had been delayed to 2022 due to payload and engine testing delays.[18] On February 23, 2023, ULA announced an expected launch date for the mission of May 4, 2023.[19] After an anomaly during testing of the Vulcan Centaur on March 29, the launch was delayed until June or July,[20] and then until late 2023.[21]

In early December, ULA CEO Tory Bruno announced that due to issues found during a wet dress rehearsal of the rocket, the launch would likely be delayed to the subsequent January 8 launch window.[2]

Peregrine carries a maximum payload mass of 90 kg (200 lb) during Mission One,[22] and it is planned to land on Gruithuisen Gamma.[23] The payload mass for the planned second mission (Mission Two) is capped at 175 kg (386 lb), and the Mission Three and later missions would carry the full payload capacity of 265 kg (584 lb).[23] The payload includes human remains on behalf of Elysium Space and Celestis; the decision to include human remains was criticized by the Navajo Nation, whose president, Buu Nygren, argued that the moon is the heritage of the Navajo and other American Indian nations.[24][25] Astronaut Philip K. Chapman, Gene Roddenberry, and several cast members of Star Trek were among those whose remains were included.[26]

The lander[edit]

The Peregrine lander was announced in 2016.[27] It inherits designs from their previous concept lander called Griffin, which was larger but with the same payload capacity.[27][28] Astrobotic had contracted Airbus Defence and Space to provide additional engineering support as they refine the lander's design.

The bus structure of Peregrine is mainly manufactured out of aluminum alloy, and it is reconfigurable for specific missions. Its propulsion system features a cluster of five thrusters, built by Frontier Aerospace.[29] Each thruster produces 150 lb (667 N) thrust. This propulsion system would propel the trans-lunar injection, trajectory corrections, lunar orbit insertion, and powered descent. The propulsion system is capable of delivering an orbiter to the Moon and then performing a powered soft landing.[23] The lander would carry up to 450 kg (990 lb) of bi-propellant mass in four tanks; its composition is MON-25 /MMH, a hypergolic bi-propellant.[30] For attitude control (orientation), the spacecraft uses twelve thrusters (45 N each) also powered by MON-25/MMH.[23]

The spacecraft's avionics systems incorporate guidance and navigation to the Moon, and a Doppler LiDAR to assist the automated landing on four legs.[27] From Mission 2 Its landing ellipse will be 100 m x 100 m, down from 24 km × 6 km previously.[23]

Peregrine is about 2.5 m wide and 1.9 m tall, and it would be able to deliver up to 265 kg (584 lb) of payload to the surface of the Moon.[27][31][23][32]

Its electrical systems will be powered by a lithium-ion battery that is recharged by a solar panel made of GaInP/GaAs/Ge. Radiators and thermal insulators are used to dispose of excess heat, but the lander does not carry heaters, so the first few Peregrine landers are not expected to survive the lunar night,[23] which lasts 14 Earth days. Future missions could be adapted to do so.[23]

For communications to Earth, the lander uses different frequencies within the X-band range for uplink as well as downlink.[23] Following landing, a 2.4 GHz Wi-Fi modem enables wireless communication between the lander and deployed rovers on the lunar surface.[23]

Payloads[edit]

Lunar rovers[edit]

Country Name Agency or company Summary
 Mexico Colmena×5 Agencia Espacial Mexicana Agencia Espacial Mexicana (AEM), the Mexican Space Agency, will fly the first Latin American scientific instrument to the surface of the Moon. The payload consists of five small robots, weighing less than 60 grams and measuring 12 centimeters in diameter, will be catapulted onto the lunar surface.[33]
 USA Iris Carnegie Mellon University Carnegie Mellon University's Iris is a 2 kg rover designed by university students. Iris's shoebox sized chassis and bottle cap wheels are made from carbon fiber, attributing to its lightweight design and another first for planetary robotics. Along with testing small, lightweight rover mobility on the Moon, Iris is collecting scientific images for geological sciences, as well as UWB RF ranging data for testing new relative localization techniques.[34]

Instruments

Country Name Agency or company Summary
 USA Laser Retroreflector Array (LRA) NASA A retroreflector bounces any light that shines on it directly backward (180° from the incoming light). The LRA is a collection of eight of these, each a 1.25-cm diameter glass corner cube prism, all embedded in an aluminum hemisphere (painted gold) and mounted to the lander deck. This design ensures that the LRA can retroreflect (i.e., bounce) laser light from other orbiting and landing spacecraft over a wide range of incoming directions and efficiently retroreflect the laser signal directly back at the originating spacecraft. This enables precision laser ranging, which is a measurement of the distance between the orbiting or landing spacecraft to the LRA on the lander. The LRA is a passive optical instrument and will function as a permanent fiducial (i.e., location) marker on the Moon for decades to come. (Note: this LRA design is too small for laser ranging from the Earth).[35]
 USA Linear Energy Transfer Spectrometer (LETS) NASA During lunar exploration missions outside of the Earth's protective atmosphere, exposure to space radiation has a detrimental effect on the health of the astronauts. Lunar surface environments present a greater radiation risk to the astronaut than Low Earth Orbit (LEO). There are two sources of radiation risk for lunar surface environments. The first source of risk is the total radiation dose from Galactic Cosmic Rays, which is about twice as high on the lunar surface as in LEO. The second source of risk is from space weather events resulting from solar activity. The Linear Energy Transfer Spectrometer (LETS) is a radiation monitor that is derived from heritage hardware flown on Orion EFT-1 and slated to fly on the Orion EM-1 mission that will enable acquisition of knowledge of the lunar radiation environment and demonstrate the capabilities of a system on the lunar surface. The LETS radiation sensor is a solid-state silicon Timepix detector that is derived from heritage hardware that was flown on Orion EFT-1. This sensor will measure the rate of incident radiation providing, information that is critical to understanding and mitigating the hazardous environment that people will experience as they explore the surface of the Moon.[35]
 Germany M-42 Radiation Detector DLR This radiation detector is a complement to another scientific experiment riding aboard NASA's Artemis I mission. These sensors will precisely measure the level of radiation a human body will encounter on a trip to the Moon and back. The data from both Artemis I and Peregrine Missions will improve our understanding of lunar spaceflight environmental conditions with respect to astronaut health, as space radiation will be one of the key risks in the future of Human Space Exploration.[36]
 USA Navigation Doppler Lidar (NDL) NASA NDL is a LIDAR-based (Light Detection and Ranging) descent and landing sensor. This instrument operates on the same principles of radar but uses pulses of light from a laser instead of radio waves. NDL measures vehicle velocity (speed and direction) and altitude (distance to ground) with high precision during descent to touchdown.[37]
 USA Near-Infrared Volatile Spectrometer System (NIRVSS) NASA The payload includes a spectrometer context imager and a longwave calibration sensor. It measures surface and subsurface hydration (H2O and OH) and CO2 and methane (CH4) while simultaneously mapping surface morphology and surface temperature. The plan is for the measurements to take place during rover traverse when integrated onto a rover, throughout areas of targeted volatile investigation (called science stations), and during drilling activities. This instrument was created at NASA Ames Research Center. In total, it has three specific instruments: the near-infrared spectrometer, Ames imaging module, and longwave calibration sensor.[35]
 USA Neutron Spectrometer System (NSS) NASA The NSS instrument will determine the abundance of hydrogen-bearing materials and the bulk regolith composition at the landing site and measure any time variations in hydrogenous volatile abundance during the diurnal cycle. NSS can measure the total volume of hydrogen up to three feet below the surface, providing high-resolution ground truth data for measurements made from instruments in orbit around the Moon. NSS measures the number and energy of neutrons present in the lunar surface environment, which can be used to infer the amount of hydrogen present in the environment. This detection is possible because when neutrons strike a hydrogen atom, they lose a lot of energy.[35]
 USA Peregrine Ion-Trap Mass Spectrometer (PITMS) NASA PITMS will characterize the lunar exosphere after descent and landing, and throughout the lunar day, to understand the release and movement of volatile species. Previous missions have demonstrated the presence of volatiles at the lunar surface, but significant questions remain about the where those volatiles came from and how they are transported across the lunar surface. Investigating how the lunar exosphere changes over the course of a lunar day can provide insight into the transport process for volatiles on the Moon. The instrument has the ability to measure the low level of gases expected in the lunar exosphere and released by regolith interaction with surface disturbances, like rovers.

The PITMS sensor has direct heritage from the Ptolemy mass spectrometer that made the first in situ measurements of volatiles and organics on comet 67P with the Rosetta lander, Philae. PITMS operates in a passive sampling mode, where molecules fall into the zenith-facing aperture and are trapped by a radiofrequency field, then sequentially released for analysis. PITMS has a unit mass resolution up to an upper mass-to-charge (m/z) limit of 150 Da.

The PITMS investigation will provide time-resolved variability of OH, H2O, noble gases, nitrogen, and sodium compounds released from the soil and present in the exosphere over the course of a lunar day. PITMS observations will complement other instruments on board the Peregrine lander for a comprehensive approach to understanding the surface and exosphere composition, linking surface properties and composition to LADEE measurements from orbit, and providing a mid-latitude point of comparison for polar measurements planned by VIPER, PROSPECT, and other missions. The PITMS data provide a critical mid-latitude link to future polar mass specs to characterize the latitudinal migration of volatiles from equator to poles.

PITMS is a joint NASA-ESA project implemented by NASA's Goddard Space Flight Center (GSFC) and ESA's contractors Open University (OU) and STFC RAL Space, with coordination and support provided by ESA's Space Research and Technology Centre (ESTEC). The integrated PITMS payload and science investigation will be operated by GSFC with an international team of scientists.[35]

 USA Terrain Relative Navigation (TRN) Astrobotic Astrobotic will demonstrate its standalone Terrain Relative Navigation (TRN) sensor as a payload on its first mission to the Moon. TRN will enable spacecraft to perform landings on planetary surfaces with an unparalleled accuracy of less than 100 meters. The TRN sensor is being developed under a $10 million NASA Tipping Point contract with NASA Johnson Space Center, Jet Propulsion Laboratory, and Moog.[36]

Time capsules[edit]

Country Name Agency or company Type
 USA Bitcoin Magazine Genesis Plate BIT Inc. Plaque
 Germany DHL MoonBox DHL Commercial payload capsules
 Canada Lunar Codex[38] Incandence Artwork, books, stories, music
 UK Footsteps on the Moon Lunar Mission One Image bank
 USA Luna 02 Celestis Memorial capsule
 Seychelles Lunar Bitcoin BitMEX Cryptocurrency
 Japan Lunar Dream Capsule[39] Astroscale Time capsule
 USA Memorial Space Flight Services Elysium Space Memorial capsule
 Hungary Memory of Mankind on the Moon Puli Space Technologies Time capsule
 USA MoonArk Carnegie Mellon University Lunar Museum
 Argentina Your Photos on the Moon @andres Artwork
 USA The Arch Libraries Arch Mission Foundation Time capsule
 Canada USA Writers on the Moon https://www.writersonthemoon.com Stories by 133 authors

Mission[edit]

Launch and trajectory[edit]

Launch of the Peregrine lunar lander on Vulcan Centaur's first flight

Peregrine launched on January 8, 2024, at 2:18 am EST, on the inaugural flight of United Launch Alliance's Vulcan Centaur rocket, from Cape Canaveral Space Launch Complex 41.[40] The rocket was launched in the VC2S configuration, with two solid rocket boosters and a standard-length fairing. The solid rocket boosters separated from the vehicle at T+1 minute 50 seconds. The first stage continued firing its BE-4 engines until T+4:59 and separated a few seconds later. The Centaur upper stage started its first burn at T+5:15, which took over 10 minutes to complete and put the vehicle into a low Earth orbit. Following a coast phase, the Centaur fired for the second time at T+43:35 to start the trans-lunar injection burn, which lasted about 3 minutes. The Peregrine lander successfully separated from the rocket at T+50:26.[41]

Following launch, Peregrine started a 46-day trajectory towards the Moon, during which it was expected to perform burns to enter orbit around the Moon and slowly approach the lunar surface. Landing was planned for February 23, 2024.[41]

Animation of Peregrine – Original plan
Around the Earth
Around the Moon
   Peregrine  ·    Moon ·    Earth

Anomaly[edit]

Roughly seven hours after the launch, Astrobotic reported an anomaly which "prevented [the lander] from achieving a stable sun-pointing orientation",[42] and further explained that a propulsion issue was the probable cause of the anomaly. The company attempted to troubleshoot by performing an unplanned maneuver of the spacecraft to orient the solar panels.[43] After an expected communications blackout, Astrobotic confirmed that the spacecraft had oriented towards a sun-pointing, power-positive state. However, the propulsion issue was identified as a gradual propellant leak that required constant depletion of fuel to counteract. In a statement issued at 21:16 EST, Astrobotic stated that thrusters were operating "well beyond their expected service life cycles" and that the "spacecraft could continue in a stable sun pointing state for approximately 40 more hours" before propellant depletion would cause the spacecraft to lose attitude control and subsequently power.[44]

Less than a day later, Astrobotic Technology said it is abandoning an attempt to put its Peregrine spacecraft on the moon less than 24 hours after the vehicle took flight. The spacecraft has suffered “critical” propellant loss from a fuel leak, according to the company."At this time, the goal is to get Peregrine as close to lunar distance as we can before it loses the ability to maintain its sun-pointing position and subsequently loses power,” the company stated.[45]

That means a potential moon landing, which had been slated for February 23, is off the table.

Future[edit]

Peregrine was the first of NASA's CLPS missions, with the second, Intuitive Machines' IM-1, set for launch in February 2024.[46] Astrobotic will attempt a second landing consisting of the larger Griffin lander and VIPER rover with launch scheduled for November 2024.[47] However, this will be delayed for internal and external investigations into the Peregrine.

References[edit]

  1. ^ Chang, Kenneth (7 January 2024). "Vulcan Rocket's Inaugural Launch Carries Moon Lander to Space – Here's what you need to know about United Launch Alliance and the robotic lunar spacecraft it is sending to orbit". The New York Times. Archived from the original on 7 January 2024. Retrieved 8 January 2024.
  2. ^ a b Bruno, Tory (December 10, 2023). "#VulcanRocket WDR update". X. Archived from the original on 10 December 2023. Retrieved 10 December 2023.
  3. ^ "NASA – NSSDCA – Spacecraft – Details". nssdc.gsfc.nasa.gov. Archived from the original on 4 December 2023. Retrieved 31 October 2023.
  4. ^ a b SpaceX Falcon 9 Rocket Will Launch Private Moon Lander in 2021 Archived October 4, 2019, at the Wayback Machine Mike Wall, Space.com October 2, 2019
  5. ^ "Astrobotic Awarded US$79.5 Million Contract to Deliver 14 NASA Payloads to the Moon" (Press release). Astrobotic Technology. May 31, 2019. Archived from the original on September 4, 2020. Retrieved August 20, 2019.
  6. ^ Cole, Michael (March 19, 2018). "Astrobotic Ready to Become Delivery Service to the Moon". Spaceflight Insider. Archived from the original on October 21, 2019. Retrieved August 20, 2019.
  7. ^ "Andy's Mission". Planetary Robotics Lab. Carnegie Mellon University. Archived from the original on February 3, 2015. Retrieved December 20, 2018.
  8. ^ Britain's first moon rover is a four-legged robot that will explore lunar tunnels Archived October 12, 2019, at the Wayback Machine Ryan Browne, CNBC October 10, 2019
  9. ^ [SpaceBit moon rover set to land on lunar surface in 2021] Sky News October 10, 2019
  10. ^ A lunar rover which will explore the moon on foot in 2021 was unveiled in London on Thursday Archived October 10, 2019, at the Wayback Machine Reuters October 10, 2019
  11. ^ UK's 1st Moon Rover to Launch in 2021 Archived October 13, 2019, at the Wayback Machine Mike Wall, "Space.com" October 12, 2019
  12. ^ Wall, Mike (May 16, 2018). "'Lunar Library' Aims to Preserve Humanity's History On the Moon (Wikipedia, Too)". Space.com. Archived from the original on May 11, 2019. Retrieved May 16, 2018.
  13. ^ Grush, Loren (May 15, 2018). "This nonprofit plans to send millions of Wikipedia pages to the Moon — printed on tiny metal sheets". The Verge. Archived from the original on May 30, 2019. Retrieved May 16, 2018.
  14. ^ "NASA Announces New Partnerships for Commercial Lunar Payload Delivery Services" (Press release). NASA. November 29, 2018. Archived from the original on November 25, 2020. Retrieved November 29, 2018. Public Domain This article incorporates text from this source, which is in the public domain.
  15. ^ "NASA funds commercial moon landers for science, exploration". Astronomy Now. June 2, 2018. Archived from the original on June 8, 2019. Retrieved August 20, 2019.
  16. ^ Wall, Mike (June 1, 2018). "These Are the Private Lunar Landers Taking NASA Science to the Moon". Space.com. Archived from the original on August 9, 2019. Retrieved August 20, 2019. Peregrine will tote as many as 14 agency payloads to a big crater on the moon's near side called Lacus Mortis by July 2021, on the lander's Mission One.
  17. ^ Grush, Loren (June 5, 2019). "This tiny rover will test how well small mobile robots can survive on the Moon". The Verge. Archived from the original on August 13, 2023. Retrieved August 20, 2019.
  18. ^ Berger, Eric (June 25, 2021). "Rocket Report: China to copy SpaceX's Super Heavy? Vulcan slips to 2022". Ars Technica. Archived from the original on June 29, 2021. Retrieved June 30, 2021.
  19. ^ Grush, Loren (February 23, 2023). "United Launch Alliance Delays Vulcan Debut Flight to Early May". Bloomberg. Archived from the original on February 27, 2023. Retrieved March 22, 2023.
  20. ^ Doughty, Nate (April 19, 2023). "ULA rocket taking Astrobotic's lunar lander to space pushes back departure date following explosion during testing". bizjournals.com. Archived from the original on 2023-04-19. Retrieved 2023-04-25.
  21. ^ Berger, Eric (14 June 2023). "Vulcan aces engine test, but upper stage anomaly will delay launch for a while "Working corrective action and retest."". Arstechnica. Archived from the original on 14 June 2023. Retrieved 14 June 2023.
  22. ^ "Peregrine Lander". Astrobotic Technology. Archived from the original on February 23, 2017. Retrieved June 5, 2019.
  23. ^ a b c d e f g h i j "Astrobotic – Payload User Guide". Astrobotic Technology. 2018. Archived from the original on June 3, 2019. Retrieved December 10, 2018.
  24. ^ Wattles, Jackie (2024-01-07). "First US moon mission in decades to launch with NASA science, human remains on board". CNN. Archived from the original on 2024-01-07. Retrieved 2024-01-08.
  25. ^ Clark, Stephen (2024-01-07). "Navajo objection to flying human ashes to the Moon won't delay launch". Ars Technica. Archived from the original on 2024-01-07. Retrieved 2024-01-08.
  26. ^ Wattles, Jackie (8 January 2024). "First US moon landing mission in decades launches with NASA science, humans remains on board". CNN. Retrieved 8 January 2024.
  27. ^ a b c d Foust, Jeff (June 3, 2016). "Astrobotic unveils Peregrine lunar lander". SpaceNews. Archived from the original on October 17, 2022. Retrieved August 20, 2019.
  28. ^ "Griffin Lander". Astrobotic Technology. Archived from the original on December 11, 2018. Retrieved December 10, 2018.
  29. ^ "Frontier Aerospace Selected for NASA Award to Develop Deep Space Thruster Using MON-25/MMH Propellant". Astrobotic Technology. Archived from the original on October 1, 2019. Retrieved October 1, 2019.
  30. ^ "Aerojet Rocketdyne Successfully Demonstrates Low-Cost, High Thrust Space Engine" (Press release). Aerojet Rocketdyne. May 23, 2018. Archived from the original on August 20, 2019. Retrieved August 20, 2019.
  31. ^ Foust, Jeff (June 13, 2016). "Landers, laws, and lunar logistics". The Space Review. Archived from the original on August 14, 2019. Retrieved August 20, 2019.
  32. ^ "Spacebit forms partnership, prepares to send tiny rover to the moon". SpaceNews. October 24, 2019. Archived from the original on October 17, 2022. Retrieved January 28, 2020.
  33. ^ "Moon Manifest | Astrobotic Technology". Archived from the original on 2024-01-04. Retrieved 2024-01-03.
  34. ^ "Archived copy". Archived from the original on 2024-01-06. Retrieved 2024-01-03.{{cite web}}: CS1 maint: archived copy as title (link)
  35. ^ a b c d e "Task Order TO2-AB Scientific Payloads – NASA Science". Archived from the original on 2023-12-07. Retrieved 2023-12-05.
  36. ^ a b "Archived copy" (PDF). Archived (PDF) from the original on 2023-11-30. Retrieved 2023-12-05.{{cite web}}: CS1 maint: archived copy as title (link)
  37. ^ "Archived copy" (PDF). Archived (PDF) from the original on 2023-11-29. Retrieved 2023-12-05.{{cite web}}: CS1 maint: archived copy as title (link)
  38. ^ "A Time Capsule of Human Creativity, Stored in the Sky". New York Times. July 7, 2023. Archived from the original on July 27, 2023. Retrieved July 7, 2023.
  39. ^ "Otsuka's POCARI SWEAT Aims the Very First Moon Landing". businesswire.com. May 15, 2014. Archived from the original on October 17, 2022. Retrieved February 6, 2021.
  40. ^ Jeff Foust (January 8, 2024). "Vulcan Centaur launches Peregrine lunar lander on inaugural mission". Spacenews. Archived from the original on January 8, 2024. Retrieved January 8, 2024.
  41. ^ a b McCrea, Aaron (8 January 2024). "Vulcan successfully launches Peregrine lunar lander on inaugural flight". NASASpaceFlight. Archived from the original on 8 January 2024. Retrieved 8 January 2024.
  42. ^ Berger, Eric (January 8, 2024). "Hours after its launch, a US lunar lander experiences an anomaly". Ars Technica. Retrieved January 8, 2024.
  43. ^ Tingley, Brett (8 January 2024). "Private Peregrine moon lander suffers anomaly after historic Vulcan rocket launch, Astrobotic says". Space.com. Retrieved 8 January 2024.
  44. ^ Astrobotic [@astrobotic] (January 9, 2024). "Update #6 for Peregrine Mission One: An ongoing propellant leak is causing the spacecraft's Attitude Control System (ACS) thrusters to operate well beyond their expected service life cycles to keep the lander from an uncontrollable tumble. If the thrusters can continue to operate, we believe the spacecraft could continue in a stable sun pointing state for approximately 40 more hours, based on current fuel consumption. At this time, the goal is to get Peregrine as close to lunar distance as we can before it loses the ability to maintain its sun-pointing position and subsequently loses power" (Tweet) – via Twitter.
  45. ^ Fisher, Jackie Wattles, Kristin (2024-01-08). "Peregrine mission abandons moon landing attempt after suffering 'critical' fuel loss". CNN. Retrieved 2024-01-09.{{cite web}}: CS1 maint: multiple names: authors list (link)
  46. ^ Foust, Jeff (19 December 2023). "Intuitive Machines delays first lunar lander launch to February". SpaceNews. Retrieved 20 December 2023.
  47. ^ "NASA Replans CLPS Delivery of VIPER to 2024 to Reduce Risk". NASA. 18 July 2022. Retrieved 18 July 2022.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Peregrine_Mission_One&oldid=1194504613"