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Restored revision 1177665038 by Renerpho (talk): That’s not what the reference says, nor the WP article on Pallas. Please give a reference not your opinion
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The mission is designed to perform 21 months of science. The spacecraft was built by NASA [[Jet Propulsion Laboratory]] (JPL) in collaboration with [[SSL (company)|SSL]] (formerly Space Systems/Loral) and [[Arizona State University]].<ref name="jpl-20221028" /><ref>{{cite news|url=http://sslmda.com/html/pressreleases/pr20151026.html|title=SSL is JPL Industrial Partner for NASA Asteroid Exploration Mission Opportunity|publisher=SSL (company)|last=Lewis|first=Wendy|date=October 26, 2015|access-date=January 4, 2017|archive-date=August 9, 2020|archive-url=https://web.archive.org/web/20200809110313/http://www.sslmda.com/html/pressreleases/pr20151026.php|url-status=live}}</ref>
The mission is designed to perform 21 months of science. The spacecraft was built by NASA [[Jet Propulsion Laboratory]] (JPL) in collaboration with [[SSL (company)|SSL]] (formerly Space Systems/Loral) and [[Arizona State University]].<ref name="jpl-20221028" /><ref>{{cite news|url=http://sslmda.com/html/pressreleases/pr20151026.html|title=SSL is JPL Industrial Partner for NASA Asteroid Exploration Mission Opportunity|publisher=SSL (company)|last=Lewis|first=Wendy|date=October 26, 2015|access-date=January 4, 2017|archive-date=August 9, 2020|archive-url=https://web.archive.org/web/20200809110313/http://www.sslmda.com/html/pressreleases/pr20151026.php|url-status=live}}</ref>


It was proposed that the rocket launch might be [[secondary payload|shared with a separate mission]] named [[Athena (spacecraft)|''Athena'']], that would perform a single flyby of asteroid [[2 Pallas]], the third-largest asteroid in the [[Solar System]].<ref name="FRB-20190310">{{cite news|last=Dorminey|first=Bruce|title=Proposed NASA SmallSat Mission Could Be First To Visit Pallas, Our Third Largest Asteroid|url=https://www.forbes.com/sites/brucedorminey/2019/03/10/proposed-nasa-smallsat-mission-could-be-first-to-visit-pallas-our-third-largest-asteroid|work=Forbes|date=March 10, 2019|access-date=March 10, 2019|archive-date=August 9, 2020|archive-url=https://web.archive.org/web/20200809110316/https://www.forbes.com/sites/brucedorminey/2019/03/10/proposed-nasa-smallsat-mission-could-be-first-to-visit-pallas-our-third-largest-asteroid/|url-status=live}}</ref> In May 2020, it was announced that the [[Falcon Heavy]] carrying Psyche would include two [[Small satellite|smallsat]] secondary payloads to study the Martian atmosphere and binary asteroids, named ''[[EscaPADE]]'' (''Escape and Plasma Acceleration and Dynamics Explorers'') and ''[[Janus (spacecraft)|Janus]]'' respectively,<ref name=sdc20200522/> but in September 2020, the ''EscaPADE'' Mars atmosphere probe was removed from the plan.<ref>[https://twitter.com/jeff_foust/status/1305526413257211904 The EscaPADE smallsat mission to study the Martian atmosphere has passed PDR, but won't launch with Psyche as originally planned; will be remanifested on a future flight] {{Webarchive|url=https://web.archive.org/web/20200914152112/https://twitter.com/jeff_foust/status/1305526413257211904 |date=September 14, 2020 }} Jeff Foust, SpaceNews, September 14, 2020</ref> ''Janus'' was later removed from the Psyche mission as well on November 18, 2022, after an assessment determined that it would not be on the required trajectory to meet its science requirements as a result of Psyche’s new launch period.<ref>{{Cite web |title=Janus Mission Removed from 2023 Psyche Launch Manifest – Janus |url=https://blogs.nasa.gov/janus/2022/11/18/janus-mission-removed-from-2023-psyche-launch-manifest/ |access-date=2022-11-20 |website=blogs.nasa.gov |date=November 18, 2022 |language=en-US |archive-date=November 25, 2022 |archive-url=https://web.archive.org/web/20221125152144/https://blogs.nasa.gov/janus/2022/11/18/janus-mission-removed-from-2023-psyche-launch-manifest/ |url-status=live }}</ref>
It was proposed that the rocket launch might be [[secondary payload|shared with a separate mission]] named [[Athena (spacecraft)|''Athena'']], that would perform a single flyby of asteroid [[2 Pallas]], the 2nd-largest asteroid in the inner [[Solar System]].<ref name="FRB-20190310">{{cite news|last=Dorminey|first=Bruce|title=Proposed NASA SmallSat Mission Could Be First To Visit Pallas, Our Third Largest Asteroid|url=https://www.forbes.com/sites/brucedorminey/2019/03/10/proposed-nasa-smallsat-mission-could-be-first-to-visit-pallas-our-third-largest-asteroid|work=Forbes|date=March 10, 2019|access-date=March 10, 2019|archive-date=August 9, 2020|archive-url=https://web.archive.org/web/20200809110316/https://www.forbes.com/sites/brucedorminey/2019/03/10/proposed-nasa-smallsat-mission-could-be-first-to-visit-pallas-our-third-largest-asteroid/|url-status=live}}</ref> In May 2020, it was announced that the [[Falcon Heavy]] carrying Psyche would include two [[Small satellite|smallsat]] secondary payloads to study the Martian atmosphere and binary asteroids, named ''[[EscaPADE]]'' (''Escape and Plasma Acceleration and Dynamics Explorers'') and ''[[Janus (spacecraft)|Janus]]'' respectively,<ref name=sdc20200522/> but in September 2020, the ''EscaPADE'' Mars atmosphere probe was removed from the plan.<ref>[https://twitter.com/jeff_foust/status/1305526413257211904 The EscaPADE smallsat mission to study the Martian atmosphere has passed PDR, but won't launch with Psyche as originally planned; will be remanifested on a future flight] {{Webarchive|url=https://web.archive.org/web/20200914152112/https://twitter.com/jeff_foust/status/1305526413257211904 |date=September 14, 2020 }} Jeff Foust, SpaceNews, September 14, 2020</ref> ''Janus'' was later removed from the Psyche mission as well on November 18, 2022, after an assessment determined that it would not be on the required trajectory to meet its science requirements as a result of Psyche’s new launch period.<ref>{{Cite web |title=Janus Mission Removed from 2023 Psyche Launch Manifest – Janus |url=https://blogs.nasa.gov/janus/2022/11/18/janus-mission-removed-from-2023-psyche-launch-manifest/ |access-date=2022-11-20 |website=blogs.nasa.gov |date=November 18, 2022 |language=en-US |archive-date=November 25, 2022 |archive-url=https://web.archive.org/web/20221125152144/https://blogs.nasa.gov/janus/2022/11/18/janus-mission-removed-from-2023-psyche-launch-manifest/ |url-status=live }}</ref>


=== Science goals and objectives ===
=== Science goals and objectives ===

Revision as of 14:43, 1 October 2023

For other uses, see Psyche (disambiguation).

Psyche
An illustration of the Psyche spacecraft
Mission typeAsteroid orbiter
Operator
COSPAR ID2023-157A Edit this at Wikidata
SATCAT no.58049Edit this on Wikidata
Website
Mission durationCruise: 5 years, 10 months (planned)[1]
Science: 21 months in orbit
Spacecraft properties
SpacecraftPsyche
ManufacturerMaxar Technologies[2]
Launch mass2,608 kg (5,750 lb) [3]
Dry mass1,648 kg (3,633 lb) [4]
Payload mass30 kg (66 lb)
Power4.5 kW
Start of mission
Launch dateOctober 12, 2023 (planned)[5]
RocketFalcon Heavy[6]
Launch siteKennedy Space Center, LC-39A
ContractorSpaceX
16 Psyche orbiter
Orbital insertionAugust 2029[1]

Psyche mission patch
← Lucy
VERITAS →

Psyche is a planned mission to explore the origin of planetary cores by orbiting and studying the metallic asteroid 16 Psyche.[7] Lindy Elkins-Tanton of Arizona State University is the principal investigator who proposed this mission for NASA's Discovery Program. NASA's Jet Propulsion Laboratory (JPL) will manage the project.

16 Psyche is the heaviest known M-type asteroid, and was once thought to be the exposed iron core of a protoplanet,[8] the remnant of a violent collision with another object that stripped off its mantle and crust. Numerous recent studies have ruled that out.[9][10][11] Radar observations of the asteroid from Earth indicate an iron–nickel composition.[12] On January 4, 2017, the Psyche mission was selected for NASA's Discovery #14 mission,[13] and launch was scheduled for no earlier than September 20, 2022,[14] but the Psyche launch was postponed.[15] Psyche is scheduled to launch no earlier than October 12, 2023 atop a SpaceX Falcon Heavy.[5][16]

History

Main article: Selection of Discovery Mission 13 and 14

Psyche was submitted as part of a call for proposals for NASA's Discovery Program that closed in February 2015. It was shortlisted on September 30, 2015, as one of five finalists and awarded US$3 million for further concept development.[7][17]

On January 4, 2017, Psyche was selected for the 14th Discovery mission, with launch set for 2023.[18] In May 2017, the launch date was moved up to target a more efficient trajectory, launching in July 2022 aboard a SpaceX Falcon Heavy launch vehicle and arriving on January 31, 2026, following a Mars gravity assist on May 23, 2023.[19]

In June 2022 NASA found that the late delivery of the testing equipment and flight software for the Psyche spacecraft did not give them enough time to complete the required testing, and decided to delay the launch, with future windows available in 2023 and 2024 to rendezvous with the asteroid in 2029 and 2030, respectively.[20]

On October 28, 2022, NASA announced that Psyche was targeting a launch period opening on October 10, 2023, which would correspond with an arrival at the asteroid in August 2029.[1]

On April 18, 2023, JPL's mission page for Psyche was updated to reflect a new launch date of October 5, 2023.[16] On September 28, 2023, the launch was again delayed to no earlier than October 12, 2023, due to an unspecified issue with the spacecraft.[5]

An independent review of the delays at JPL reported in November 2022 found understaffing, insufficient planning, and communications issues among engineers and with management. The VERITAS Venus mission was delayed to free up staff to focus on Psyche.[21]

Mission overview

The Psyche spacecraft is designed with solar electric propulsion,[22][23] and the scientific payload includes a multispectral imager, a magnetometer, and a gamma-ray spectrometer.[23][24]

The mission is designed to perform 21 months of science. The spacecraft was built by NASA Jet Propulsion Laboratory (JPL) in collaboration with SSL (formerly Space Systems/Loral) and Arizona State University.[1][25]

It was proposed that the rocket launch might be shared with a separate mission named Athena, that would perform a single flyby of asteroid 2 Pallas, the 2nd-largest asteroid in the inner Solar System.[26] In May 2020, it was announced that the Falcon Heavy carrying Psyche would include two smallsat secondary payloads to study the Martian atmosphere and binary asteroids, named EscaPADE (Escape and Plasma Acceleration and Dynamics Explorers) and Janus respectively,[19] but in September 2020, the EscaPADE Mars atmosphere probe was removed from the plan.[27] Janus was later removed from the Psyche mission as well on November 18, 2022, after an assessment determined that it would not be on the required trajectory to meet its science requirements as a result of Psyche’s new launch period.[28]

Science goals and objectives

Artist's illustration depicting the metal-rich asteroid Psyche.
Shape model of asteroid Psyche, with some of the observed surface features indicated.

Differentiation was a fundamental process in shaping many asteroids and all terrestrial planets, and direct exploration of a core could greatly enhance understanding of this process. The Psyche mission aims to characterize 16 Psyche's geology, shape, elemental composition, magnetic field, and mass distribution. It is expected that this mission will increase the understanding of planetary formation and interiors.

Instruments onboard of the spacecraft:[29]
1. Hall-effect thrusters
2. Optical telecommunications system
3. Star trackers
4. Low-gain antenna
5. Sun sensor
6. X-band High-gain antenna
7. Neutron spectrometer
8. Gamma-ray spectrometer
9. Cold gas thrusters
10. -Y Panel
11. Magnetometer
12. Top deck
13. +Y Panel
14. Multispectral imagers (x2)

Specifically, the science goals for the mission are:

  • Understand a previously unexplored building block of planet formation: iron cores.
  • Look inside terrestrial planets, including Earth, by directly examining the interior of a differentiated body, which otherwise could not be seen.
  • Explore a new type of world, made of metal.

The science objectives are:

  • Determine whether 16 Psyche is a core, or if it is unmelted material.
  • Determine the relative ages of regions of 16 Psyche's surface.
  • Determine whether small metal bodies incorporate the same light elements as are expected in the Earth's high-pressure core.
  • Determine whether 16 Psyche was formed under conditions more oxidizing or more reducing than Earth's core.
  • Characterize 16 Psyche's topography.

The science questions this mission aims to address are:[8]

  • Is 16 Psyche the stripped core of a differentiated planetesimal, or was it formed as an iron-rich body? What were the building blocks of planets? Did planetesimals that formed close to the Sun have very different bulk compositions?
  • If 16 Psyche was stripped of its mantle, when and how did that occur?
  • If 16 Psyche was once molten, did it solidify from the inside out, or the outside in?
  • Did 16 Psyche produce a magnetic dynamo as it cooled?
  • What are the major alloy elements that coexist in the iron metal of the core?
  • What are the key characteristics of the geologic surface and global topography? Does 16 Psyche look radically different from known stony and icy bodies?
  • How do craters on a metal body differ from those in rock or ice?

Instruments

Psyche will fly a payload of 30 kg (66 lb),[3] consisting of four scientific instruments:[30]

Spacecraft

The spacecraft bus is the Space Systems Loral (SSL) 1300 platform.[31] JPL added the command and data handling and telecom subsystems and all flight software.[31]

Propulsion

SPT-140 Hall-effect thrusters undergoing testing at NASA's Jet Propulsion Laboratory.
SPT-140 Parameter/units [32][33]
Type Hall-effect thruster
Power [31] Max: 4.5 kW
Min: 900 watts
Specific impulse (Isp) 1800 seconds
Thrust 280 mN[33]
Thruster mass 8.5 kg
Propellant mass 922 kg of xenon[34]
Total impulse 8.2 MN·s (for Psyche)

This mission will use four of the model SPT-140 engine, a Hall-effect thruster utilizing solar electric propulsion, where electricity generated from solar panels is transmitted to an electric, rather than chemically powered, rocket engine.[22][35][36] The thruster is nominally rated at 4.5 kW operating power,[37] but it will also operate for long durations at about 900 watts.[35] Psyche will be the first mission to use Hall-effect thrusters beyond lunar orbit.[38]

The SPT-140 (SPT stands for Stationary Plasma Thruster) is a production line commercial propulsion system[3] that was invented in the USSR by OKB Fakel and developed by NASA's Glenn Research Center, Space Systems Loral, and Pratt & Whitney since the late 1980s.[39][40] The SPT-140 thruster was first tested in U.S. as a 3.5 kW unit in 2002 as part of the Air Force Integrated High Payoff Rocket Propulsion Technology program.[37][3]

Using solar electric thrusters will allow the spacecraft to arrive at 16 Psyche (at 3.3 astronomical units) much faster while consuming only 10% of the propellant it would need using conventional chemical propulsion.[citation needed]

Power

One of two solar arrays on the spacecraft deployed in JPL's clean room.
Solar panels Parameter/units [32][33]
Type Triple-Junction Solar Cells[31]
Power Solar array performance: At Earth: 20 kW
At 16 Psyche: 2.3 kW [31]

Electricity will be generated by bilateral solar panels in an X-shaped configuration, with five panels on each side. Prior to the mission being moved forward with a new trajectory, the panels were to be arranged in straight lines, with only four panels on each side of the spacecraft.[41]

Laser communications experiment

DSOC’s flight transceiver can be identified by its large tube-like sunshade on the Psyche spacecraft, as seen here inside a clean room at JPL.

The spacecraft will also test an experimental laser communication technology called Deep Space Optical Communications (DSOC).[42] It is hoped that the device will be able to increase spacecraft communications performance and efficiency by 10 to 100 times over conventional means.[42][43] Deep Space Optical Communications (DSOC) experiment is NASA's first demonstration of optical communications beyond the Earth-Moon system. DSOC is a system that consists of a flight laser transceiver, a ground laser transmitter, and a ground laser receiver. New technologies have been implemented in each of these elements. The transceiver is mounted on the Psyche spacecraft. The DSOC technology demonstration will begin shortly after launch and continue as the spacecraft travels from Earth to its gravity-assist flyby of Mars. DSOC operations are planned for one year after launch, with extended-mission opportunities to be evaluated. Palomar Observatory's Hale Telescope will receive the high-rate data downlink from the DSOC flight transceiver.[44][45]

The Discovery program solicitation offered mission projects an extra $30 M if they would host and test the 25 kg DSOC unit which needs about 75 Watts.[46] It is hoped to advance DSOC to TRL 6.[45] DSOC tests should begin about 60 days after launch. The test-runs of the laser equipment will occur over distances of 0.1 to 2.5 astronomical units (AU) on the outward-bound probe.[45]

Flight hardware: The DSOC flight laser transceiver will feature a near-infrared laser transmitter to send high-rate data to the ground system, and a sensitive photon-counting camera to receive a ground-transmitted laser. The transceiver's 8.6-inch (22-centimeter) aperture telescope is mounted on an assembly of struts and actuators that stabilizes the optics from spacecraft vibrations. The flight hardware is fitted with a sunshade and protrudes from the side of the spacecraft, making it one of Psyche's easily identifiable features.[44]

Ground systems: A high-power near-infrared laser transmitter at the Jet Propulsion Laboratory's Table Mountain facility near Wrightwood, California, will uplink a modulated laser beam to the flight transceiver and demonstrate the transmission of low-rate data. The uplink laser will also act as a beacon for the flight transceiver to lock onto. The downlink data sent back by the DSOC transceiver on Psyche will be collected by the 200-inch (5.1-meter) Hale Telescope at Caltech's Palomar Observatory in San Diego County, California, using a sensitive superconducting nanowire photon-counting receiver to demonstrate high-rate data transfer.[44]

Operations

Mission Plan of Psyche

Launch and trajectory

As of September 2023, Psyche is scheduled to launch no earlier than October 12, 2023, on a Falcon Heavy vehicle.[5][16] The cost of the launch is US$117 million.[6] Psyche will conduct a gravity assist maneuver at Mars in 2026, which will position the spacecraft for arrival at the target asteroid in August 2029.[1]

Orbit regimes

Orbital Operations of Psyche

The orbits are named alphabetically from highest (A) to lowest (D), but they don't proceed in alphabetical order. Rather, they proceed based on the changing amount of sunlight illuminating the asteroid's surface during observation and the kind of science that can be done. The expected order of orbits during Psyche's prime mission is A, B1, D, C, B2.[47]

Psyche is scheduled to enter orbit around 16 Psyche in August 2029.[1] The spacecraft would orbit at decreasing altitudes or regimes.[38] Its first regime, Orbit A, would see the spacecraft enter a 700 km (430 mi) orbit for magnetic field characterization and preliminary mapping for a duration of 56 days. It would then descend to Orbit B, set at 290 km (180 mi) altitude for 76 days, for topography and magnetic field characterization. It would then descend to Orbit C, at 170 km (110 mi) altitude for 100 days to perform gravity investigations and continue magnetic field observations. Finally, the orbiter will enter Orbit D, set at 85 km (53 mi) to determine the chemical composition of the surface using its gamma-ray and neutron spectrometers. It will also acquire continued imaging, gravity, and magnetic field mapping. The mission is expected to orbit the asteroid for at least 21 months.[38][48]

Orbit regimes[49]
Orbit regime Date
(UTC)		 Duration
(day)		 Orbital period
(hour)		 Altitude
(km)		 Inclination
(degree)		 Mission
Orbit A August 2029 56 32.8 700 90 Magnetic field characterization and preliminary mapping
Orbit B1 92 11.6 303 90 Topography and magnetic field characterization
Orbit D 100 3.6 75 160 Determining the chemical composition of the surface
Orbit C 100 7.2 190 90 Gravity investigations and Magnetic field observations
Orbit B2 100 11.6 303 90 Topography and magnetic field characterization

The laser beams from the spacecraft will be received by a ground telescope at Palomar Observatory in California.[45] Laser beams to the spacecraft will be sent from a smaller telescope at JPL Table Mountain Facility.[45]

Construction and pre-launch testing

Testing

Psyche's thruster integration underway

Testing began on the spacecraft in December 2021. These tests include but are not limited to electromagnetic testing and TVAC, or thermal vacuum chamber testing. The electromagnetic testing is conducted to ensure that the electronics and magnetic components that make up the spacecraft will not interfere with each other while conducting the mission. The TVAC testing was conducted inside the 85 by 25 foot vacuum chamber at JPL's facility in Southern California, which replicates the lack of air in space. This allows for the engineers and scientist to observe the effects of the space environment on the orbiter. Inside the TVAC the JPL employees can observe how well the spacecraft reacts to harsh conditions. Without air surrounding the spacecraft the heating and cooling of the unit is affected. The spacecraft will be hot in the hours after launch, when it’s still close to Earth and facing the Sun, especially with its electronics running, and later, when the spacecraft gets farther from the Sun, it faces intense cold, especially when flying in Psyche's shadow. Vibration tests of the spacecraft by scientists and engineers ensure it can survive the extreme conditions of the rocket launch. They also performed shock testing to ensure the spacecraft could survive the shock of separation from the rocket's second stage. Finally, they performed acoustic testing on the craft. The sound of the launch can be so violent that it can damage the hardware, so intense acoustic testing was performed to ensure mission success.[50]

Further reading

  • Zuber, Maria T.; Park, Ryan S.; Elkins-Tanton, Linda T.; Bell, J. F.; Bruvold, Kristoffer N.; Bercovici, David; Bills, Bruce G.; Binzel, Richard P.; Jaumann, R.; Marchi, Simone; Raymond, Carol A.; Roatsch, T.; Wang, Charles C.; Weiss, Benjamin P.; Wenkert, Daniel; Wieczorek, Mark A. (October 18, 2022). "The Psyche Gravity Investigation". Space Science Reviews. 218 (8): 57. Bibcode:2022SSRv..218...57Z. doi:10.1007/s11214-022-00905-3. ISSN 1572-9672. S2CID 252922565. Retrieved August 29, 2023.

References

  1. ^ a b c d e f "NASA Continues Psyche Asteroid Mission". JPL. NASA. October 28, 2022. Archived from the original on November 8, 2022. Retrieved October 28, 2022.
  2. ^ a b "FY 2021 President's Budget Request Summary" (PDF). NASA. February 10, 2020. pp. 437–439. Archived (PDF) from the original on June 17, 2020. Retrieved February 22, 2020. Public Domain This article incorporates text from this source, which is in the public domain.
  3. ^ a b c d Lord, Peter W.; van Ommering, Gerrit (2015). Evolved Commercial Solar Electric Propulsion: A Foundation for Major Space Exploration Missions (PDF). 31st Space Symposium, Technical Track, April 13–14, 2015, Colorado Springs, Colorado. Archived from the original (PDF) on January 7, 2018. Retrieved January 6, 2018.
  4. ^ "Psyche: Journey to a Metallic World". Archived from the original on February 11, 2021. Retrieved February 9, 2021 – via www.youtube.com.
  5. ^ a b c d "Launch of NASA's Psyche asteroid mission slips a week due to spacecraft issue". spaceflightnow.com. September 28, 2023. Retrieved September 28, 2023.
  6. ^ a b Foust, Jeff (February 28, 2020). "Falcon Heavy to launch NASA Psyche asteroid mission". SpaceNews. Archived from the original on March 1, 2020. Retrieved February 29, 2020.
  7. ^ a b Chang, Kenneth (January 6, 2017). "A Metal Ball the Size of Massachusetts That NASA Wants to Explore". The New York Times. Archived from the original on January 7, 2017. Retrieved March 3, 2017.
  8. ^ a b Elkins-Tanton, L. T.; et al. (2014). Journey to a Metal World: Concept for a Discovery Mission to Psyche (PDF). 45th Lunar and Planetary Science Conference March 17–24, 2014 The Woodlands, Texas. 1253. Bibcode:2014LPI....45.1253E. LPI Contribution No. 1777.
  9. ^ Elkins-Tanton, L. T.; et al. (2020). "Observations, meteorites, and models: A preflight assessment of the composition and formation of (16) Psyche". Journal of Geophysical Research: Planets. 125 (3): 23. Bibcode:2020JGRE..12506296E. doi:10.1029/2019JE006296. PMC 7375145. PMID 32714727. S2CID 214018872.
  10. ^ P. Vernazza; M. Ferrais; L. Jorda; J. Hanuš; et al. (October 4, 2021). "VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis" (PDF). Astronomy & Astrophysics. 654: A56. Bibcode:2021A&A...654A..56V. doi:10.1051/0004-6361/202141781. S2CID 239104699. Archived (PDF) from the original on October 12, 2021. Retrieved October 14, 2021.
  11. ^ Shepard, Michael K.; De Kleer, Katherine; Cambioni, Saverio; Taylor, Patrick A.; Virkki, Anne K.; Rívera-Valentin, Edgard G.; Rodriguez Sanchez-Vahamonde, Carolina; Fernanda Zambrano-Marin, Luisa; Magri, Christopher; Dunham, David; Moore, John; Camarca, Maria (2021). "Asteroid 16 Psyche: Shape, Features, and Global Map". The Planetary Science Journal. 2 (4): 125. arXiv:2110.03635. Bibcode:2021PSJ.....2..125S. doi:10.3847/PSJ/abfdba. S2CID 235918955.
  12. ^ Shepard, Michael K. (January 2017). "Radar observations and shape model of asteroid 16 Psyche". Icarus. 281: 388–403. Bibcode:2017Icar..281..388S. doi:10.1016/j.icarus.2016.08.011.
  13. ^ Grush, Loren (January 4, 2017). "In the 2020s NASA will launch spacecraft to study Jupiter's asteroids, and another made of metal". The Verge. Archived from the original on January 5, 2017. Retrieved September 8, 2017.
  14. ^ Clark, Stephen (May 23, 2022). "Launch of NASA's Psyche asteroid mission delayed to late September". Spaceflight Now. Archived from the original on July 2, 2022. Retrieved May 24, 2022.
  15. ^ Foust, Jeff (June 24, 2022). "Software testing problem delays Psyche launch". SpaceNews. Retrieved June 25, 2022.
  16. ^ a b c "Psyche". NASA Jet Propulsion Laboratory (JPL) - Robotic Space Exploration. NASA/JPL-Caltech. Archived from the original on March 2, 2022. Retrieved April 27, 2023.
  17. ^ Brown, Dwayne C.; Cantillo, Laurie (September 30, 2015). "NASA Selects Investigations for Future Key Planetary Mission". NASA. Archived from the original on August 9, 2020. Retrieved October 1, 2015. Public Domain This article incorporates text from this source, which is in the public domain.
  18. ^ Brown, Dwayne C.; Cantillo, Laurie (January 4, 2017). "NASA Selects Two Missions to Explore the Early Solar System". NASA. Archived from the original on June 17, 2019. Retrieved January 4, 2017. Public Domain This article incorporates text from this source, which is in the public domain.
  19. ^ a b Mathewson, Samantha (March 2, 2020). "NASA picks SpaceX Falcon Heavy to launch Psyche mission to metal asteroid in 2022". SPACE.com. Archived from the original on August 9, 2020. Retrieved May 22, 2020.
  20. ^ "NASA Announces Launch Delay for Its Psyche Asteroid Mission". NASA Jet Propulsion Laboratory (JPL). Archived from the original on June 24, 2022. Retrieved June 24, 2022.
  21. ^ Jeff Foust (November 5, 2022). "Psyche review finds institutional problems at JPL". Space News.
  22. ^ a b Agle, D. C.; Russell, Jimi; Cantillo, Laurie; Brown, Dwayne (September 28, 2017). "NASA Glenn Tests Thruster Bound for Metal World". NASA. Archived from the original on April 12, 2020. Retrieved January 6, 2018. Public Domain This article incorporates text from this source, which is in the public domain.
  23. ^ a b Kane, Van (February 19, 2014). "Mission to a Metallic World: A Discovery Proposal to Fly to the Asteroid Psyche". The Planetary Society. Archived from the original on October 4, 2015. Retrieved October 1, 2015.
  24. ^ Wampler, Stephen (November 4, 2015). "Lab-Johns Hopkins team tapped to work on possible NASA effort to explore asteroid". Lawrence Livermore National Laboratory. Archived from the original on August 9, 2020. Retrieved December 21, 2015. Public Domain This article incorporates text from this source, which is in the public domain.
  25. ^ Lewis, Wendy (October 26, 2015). "SSL is JPL Industrial Partner for NASA Asteroid Exploration Mission Opportunity". SSL (company). Archived from the original on August 9, 2020. Retrieved January 4, 2017.
  26. ^ Dorminey, Bruce (March 10, 2019). "Proposed NASA SmallSat Mission Could Be First To Visit Pallas, Our Third Largest Asteroid". Forbes. Archived from the original on August 9, 2020. Retrieved March 10, 2019.
  27. ^ The EscaPADE smallsat mission to study the Martian atmosphere has passed PDR, but won't launch with Psyche as originally planned; will be remanifested on a future flight Archived September 14, 2020, at the Wayback Machine Jeff Foust, SpaceNews, September 14, 2020
  28. ^ "Janus Mission Removed from 2023 Psyche Launch Manifest – Janus". blogs.nasa.gov. November 18, 2022. Archived from the original on November 25, 2022. Retrieved November 20, 2022.
  29. ^ "Navigation Models for Psyche Electric Propulsion Uncertainty" (PDF). NASA/Caltech/JPL. Archived (PDF) from the original on April 30, 2022. Retrieved April 30, 2022.
  30. ^ Valentine, Karin (December 20, 2016). "Journey to a metal world". ASU Now. Arizona State University. Archived from the original on December 27, 2016. Retrieved December 23, 2016.
  31. ^ a b c d e "Development of the Psyche Mission for NASA's Discovery Program" (PDF). Archived from the original (PDF) on June 24, 2018.
  32. ^ a b Myers, Roger. "Solar Electric Propulsion: Introduction, Applications and Status" (PDF). Aerojet Rocketdyne. Archived (PDF) from the original on January 7, 2018. Retrieved January 6, 2018.
  33. ^ a b c Johnson, Ian K.; Kay, Ewan; Lee, Ty; Bae, Ryan; Feher, Negar (2017). New Avenues for Research and Development of Electric Propulsion Thrusters at SSL (PDF). 35th International Electric Propulsion Conference October 8–12, 2017 Atlanta, Georgia. IEPC-2017-400. Archived from the original (PDF) on January 7, 2018. Retrieved January 6, 2018.
  34. ^ Greicius, Tony (September 20, 2021). "Solar Electric Propulsion Makes NASA's Psyche Spacecraft Go". NASA. Archived from the original on April 7, 2022. Retrieved May 11, 2022.
  35. ^ a b Cole, Michael (October 9, 2017). "NASA Glenn tests solar electric propulsion thruster for journey to metal world". Spaceflight Insider. Archived from the original on January 7, 2018. Retrieved January 6, 2018.
  36. ^ DeFelice, David (August 18, 2015). "NASA – Ion Propulsion". NASA. Archived from the original on December 31, 2018. Retrieved January 20, 2018. Public Domain This article incorporates text from this source, which is in the public domain.
  37. ^ a b "T-140". University of Michigan Plasmadynamics & Electric Propulsion Laboratory. Archived from the original on June 17, 2018. Retrieved January 6, 2018.
  38. ^ a b c Oh, David Y.; Collins, Steve; Goebel, Dan; Hart, Bill; Lantoine, Gregory; Snyder, Steve; Whiffen, Greg; Elkins-Tanton, Linda; Lord, Peter; Pirkl, Zack; Rotlisburger, Lee (2017). Development of the Psyche Mission for NASA's Discovery Program (PDF). 35th International Electric Propulsion Conference, October 8–12, 2017, Atlanta, Georgia. IEPC-2017-153. Archived from the original (PDF) on June 24, 2018. Retrieved January 7, 2018.
  39. ^ "Native Electric Propulsion Engines Today" (in Russian). Novosti Kosmonavtiki. 1999. Archived from the original on June 6, 2011.
  40. ^ Delgado, Jorge J.; Corey, Ronald L.; Murashko, Vjacheslav M.; Koryakin, Alexander I.; Pridanikov, Sergei Y. (2014). Qualification of the SPT-140 for use on Western Spacecraft. 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, July 28–30, 2014, Cleveland, Ohio. doi:10.2514/6.2014-3606. AIAA 2014–3606.
  41. ^ Agle, D. C.; Valentine, Karin; Cantillo, Laurie; Brown, Dwayne C. (May 24, 2017). "NASA Moves Up Launch of Psyche Mission to a Metal Asteroid". NASA. Archived from the original on December 2, 2020. Retrieved January 6, 2018. Public Domain This article incorporates text from this source, which is in the public domain.
  42. ^ a b David, Leonard (October 18, 2017). "Deep Space Communications via Faraway Photons". NASA / Jet Propulsion Laboratory. Archived from the original on January 11, 2020. Retrieved October 19, 2017. Public Domain This article incorporates text from this source, which is in the public domain.
  43. ^ Greicius, Tony (September 14, 2017). "Psyche Overview". NASA. Archived from the original on November 10, 2021. Retrieved September 18, 2017. Public Domain This article incorporates text from this source, which is in the public domain.
  44. ^ a b c Harbaugh, Jennifer (May 22, 2017). "Deep Space Optical Communications (DSOC)". NASA. Archived from the original on May 7, 2022. Retrieved May 11, 2022. Public Domain This article incorporates text from this source, which is in the public domain.
  45. ^ a b c d e Hall, Loura, ed. (October 18, 2017). ""Lighten Up" – Deep Space Communications via Faraway Photons". NASA. Archived from the original on April 10, 2019. Retrieved January 6, 2018. Public Domain This article incorporates text from this source, which is in the public domain.
  46. ^ "NASA Drops Laser Comm Requirement From Discovery Solicitation". SpaceNews. November 6, 2014.
  47. ^ "Psyche Orbital Operations". NASA Jet Propulsion Laboratory (JPL). Retrieved September 3, 2023. Public Domain This article incorporates text from this source, which is in the public domain.
  48. ^ "Psyche". NSSDC. NASA. Archived from the original on June 16, 2020. Retrieved October 28, 2022.
  49. ^ "Psyche Orbital Operations". JPL, NASA.
  50. ^ Greicius, Tony (April 3, 2022). "Shake and Bake: NASA's Psyche Is Tested in Spacelike Conditions". NASA. Archived from the original on May 26, 2022. Retrieved May 12, 2022.
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