{"id":10288,"date":"2023-10-13T18:33:06","date_gmt":"2023-10-13T10:33:06","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/falcon-heavy-launches-nasas-psyche-asteroid-probe\/"},"modified":"2023-10-13T18:33:06","modified_gmt":"2023-10-13T10:33:06","slug":"falcon-heavy-launches-nasas-psyche-asteroid-probe","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/falcon-heavy-launches-nasas-psyche-asteroid-probe\/","title":{"rendered":"Falcon Heavy launches NASA\u2019s Psyche asteroid probe"},"content":{"rendered":"
\"\"
Falcon Heavy climbs away from Kennedy Space Center, carrying NASA\u2019s Psyche spacecraft. Image: Michael Cain\/Spaceflight Now.<\/figcaption><\/figure>\n

Getting off to a ground-shaking start, NASA\u2019s $1.2 billion Psyche asteroid probe roared into space atop a Falcon Heavy rocket Friday, setting off on a 2.2-billion-mile voyage to a rare, metal-rich asteroid that may hold clues about how the cores of rocky planets like Earth first formed.<\/p>\n

\u201cWe\u2019re going to learn about a previously unstudied ingredient that went into making our habitable Earth, and that is the metal that is now in the Earth\u2019s core and the cores of all of the rocky planets, cores that we can never visit but of course that we want to learn about,\u201d said Principal Investigator Lindy Elkins-Tanton.<\/p>\n

\u201cAnd Psyche is the single largest metallic object in our solar system. So if we want to learn about our cores, that\u2019s where we need to go.\u201d<\/p>\n

Following multiple setbacks and delays in the wake of the Covid pandemic \u2014 and a 24-hour slip due to stormy weather Thursday \u2014 the Psyche mission finally got under way at 10:19 a.m. EDT when the SpaceX Falcon Heavy\u2019s 27 first-stage engines ignited with a thundering rush of flaming exhaust.<\/p>\n

After a final round of lightning-fast computer checks, the 230-foot-tall rocket was released from historic pad 39A at the Kennedy Space Center, smoothly climbing away atop more than 5 million pounds of thrust.<\/p>\n

The Falcon Heavy\u2019s two strap-on side boosters shut down and peeled away two-and-a-half minutes after liftoff and flew back to staggered side-by-side landings at the Cape Canaveral Space Force Station. The expendable central core booster continued firing another minute and a half before it, too, fell away.<\/p>\n

The single engine powering the rocket\u2019s second stage then took over the climb to space. After a 45-minute coast, the engine fired a second time, putting the vehicle on the required Earth-escape trajectory. The 6,000-pound Psyche probe was released to fly on its own six minutes later, kicking off a six-year voyage to the asteroid it was named after.<\/p>\n

Discovered in 1852 by the Italian astronomer Annibale de Gasparis, 16 Psyche is the largest of nine known metal-rich asteroids, orbiting in the outer asteroid belt between Mars and Jupiter three times farther from the sun than Earth.<\/p>\n

Radar observations show it\u2019s shaped roughly like a potato, measuring 173 miles across and 144 miles long, but it only appears as a star-like dot in even the most powerful telescopes. Scientist know from spectral and other observations that its metal content is high.<\/p>\n

\u201cWe\u2019re quite confident that it is largely made of metal along with something else,\u201d said Elkins-Tanton. \u201cThat\u2019s something else might be rock, it might be sulfur based and it might be carbon based. We don\u2019t know. And that is really the excitement of this.\u201d<\/p>\n

\"\"
An artist\u2019s conception of the Psyche spacecraft orbiting near the surface of the Psyche asteroid. Image: Maxar\/ASU\/Peter Rubin.<\/figcaption><\/figure>\n

Earlier in the project, a reporter asked her how much an asteroid like Psyche might be worth given its high metal content. The numbers ranged as high as $10 quintillion.<\/p>\n

\u201cIt\u2019s my fault, because I did do that calculation,\u201d Elkins-Tanton said. \u201cIt makes such a great headline. But it\u2019s false in every way. We have zero technology to bring Psyche back to Earth. And if we did, it would likely be a catastrophic mistake. It would flood the metals market and it would literally be worth nothing. And so calculating the value of it (is) a fun intellectual exercise with no truth to it.\u201d<\/p>\n

Likewise, an artist\u2019s impression of the asteroid, based on guidance from Elkins-Tanton and the latest thinking about remnant planetary cores. While the image is \u201cplausible for what we suspect,\u201d she said, it\u2019s \u201cnot real, because we don\u2019t know what it looks like.\u201d<\/p>\n

Or how it formed in the first place. There are two leading theories.<\/p>\n

\u201cOne is that it\u2019s a core of a body, analogous to like what is inside the Earth, with a molten metallic center,\u201d said Ben Weiss, Psyche deputy principal investigator at MIT. \u201cBut in this case, Psyche had its outer layers stripped off by asteroid impacts in the early solar system, so we can see (the exposed core) today.<\/p>\n

\u201cThe other idea is that Psyche is a kind of primordial, unmelted body, basically formed from the very first materials in the solar system that (has been) preserved in this primordial state ever since.\u201d<\/p>\n

The Psyche spacecraft, built at the Jet Propulsion Laboratory using a modified satellite body provided by Maxar, will attempt to answer those questions and many more during 26 months of close-range observations using a suite of sophisticated instruments.<\/p>\n

The probe is equipped with two multi-spectral cameras to map the surface in exquisite detail, two magnetometers to measure whatever magnetic field might be frozen in the once liquid metal, a gamma ray and neutron mass spectrometer to chart the asteroid\u2019s chemical composition and a radio science experiment to measure its gravitational field.<\/p>\n

But it will not be easy. And it will not be quick.<\/p>\n

To reach its quarry, the spacecraft will use solar electric propulsion electrically accelerating ionized xenon atoms in any one of four Hall-effect thrusters to produce a gentle but constant push.<\/p>\n

Psyche will launch with 2,392 pounds of xenon in seven 22-gallon tanks. The electrical power to strip away electrons and ionize the fuel will come from two five-panel solar wings capable of generating 21 kilowatts near Earth, dropping to between 2.3 and 3.4 kilowatts at Psyche\u2019s distance from the sun.<\/p>\n

\u201cYou can think of this as getting thrust from sunlight,\u201d said David Oh, Psyche\u2019s chief engineer for operations at JPL. \u201cIt\u2019s the ultimate in green propulsion for our spacecraft.\u201d<\/p>\n

Unlike chemical propulsion rocket engines, which consume propellant in fuel-gulping bursts of high power, Hall effect thrusters produce vastly less thrust, roughly equivalent to the weight of three quarters. But they can run around the clock, slowly but surely building up speed while getting about 10 million miles per gallon.<\/p>\n

After three to four months of testing and checkout, Psyche will loop out toward Mars, flying past the red planet in May 2026 at an altitude between 1,900 and 2,700 miles for a gravity assist flyby that will boost the spacecraft\u2019s velocity from about 45,600 mph relative to the sun to about 52,22 mph.<\/p>\n

Along the way to Mars, engineers will put a hitchhiker payload through its paces: the Deep Space Optical Communications, or DSOC, experiment. An infrared laser and telescope assembly attached to the side of the Psyche spacecraft will attempt to send data back to Earth at vastly higher rates than possible with traditional radio signals.<\/p>\n

Laser communications have been tested around the moon, but DSOC is the first to be used in deep space. At such distances, sending signals back to the 200-inch Hale telescope at Mount Palomar in California is roughly equivalent to hitting a dime at a distance of one mile.<\/p>\n

\u201cWe\u2019re very excited about launch and looking forward to the important lessons learned, which will in the future enable human missions to Mars and the use of very high resolution instruments,\u201d said Abi Biswas, a DSOC manager at the Jet Propulsion Laboratory.<\/p>\n

The Mars flyby will send Psyche spiraling outward, slowly but surely catching up with its target. In May 2029, the spacecraft\u2019s cameras will begin imaging the asteroid, using the data to fine tune its approach.<\/p>\n

Two months later, after a voyage covering 2.2 billion miles, Psyche will be close enough to be captured by the asteroid\u2019s feeble gravity.<\/p>\n

Four basic orbital altitudes are planned, starting at an height of about 441 miles above the surface, then dropping to 188 miles and finally to less than 50 miles before moving back out to an altitude of about 118 miles.<\/p>\n

\"\"
The Psyche probe will need nearly six years to reach its target in the outer asteroid belt. After a gravity-assist flyby of Mars in 2026, the spacecraft will spiral out to the asteroid 16 Psyche, slipping into orbit around the unusual metal-rich body in 2029. Image: NASA.<\/figcaption><\/figure>\n

Throughout, Psyche\u2019s cameras will map the surface at higher and higher resolutions, magnetometers will chart the asteroid\u2019s magnetic field while scientists on Earth measure its gravitational field by studying minute changes in the spacecraft\u2019s velocity as seen in subtle changes in the radio signals sent back to Earth.<\/p>\n

At its lowest altitude of about 45 miles, the probe\u2019s gamma ray and neutron spectrometer will characterize the mineral composition across the asteroid\u2019s surface.<\/p>\n

The final set of orbital observations is expected to begin in mid January 2031. Psyche\u2019s prime mission is expected to end on Nov. 1, 2031.<\/p>\n","protected":false},"excerpt":{"rendered":"

Falcon Heavy climbs away from Kennedy Space Center, carrying NASA\u2019s Psyche spacecraft. Image: Michael Cain\/Spaceflight Now. Getting off to a ground-shaking start, NASA\u2019s $1.2 billion Psyche asteroid probe roared into space atop a Falcon Heavy rocket Friday, setting off on a 2.2-billion-mile voyage to a rare, metal-rich asteroid that may hold clues about how the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[1517,678,190,1516,316],"class_list":["post-10288","post","type-post","status-publish","format-standard","hentry","category-news","tag-asteroid-16-psyche","tag-falcon-heavy","tag-nasa","tag-psyche","tag-spacex"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/10288"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=10288"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/10288\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=10288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=10288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=10288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}