Tag: Asteroids

Categories
GeekWire

This asteroid is spinning fast enough to set a record

Illustration: Fast-spinning asteroid surrounded by other space rocks
An artist’s conception zeroes in on asteroid 2025 MN45. (Credit: NSF-DOE Vera C. Rubin Observatory / NOIRLab / SLAC / AURA / P. Marenfeld)

Astronomers say they’ve found an asteroid that spins faster than other space rocks of its size.

The asteroid, known as 2025 MN45, is nearly half a mile (710 meters) in diameter and makes a full rotation every 1.88 minutes, based on an analysis of data from the Vera C. Rubin Observatory. “This is now the fastest-spinning asteroid that we know of, larger than 500 meters,” University of Washington astronomer Sarah Greenstreet said today at the American Astronomical Society’s winter meeting in Phoenix.

Greenstreet, who serves as an assistant astronomer at the National Science Foundation’s NOIRLab and heads the Rubin Observatory’s working group for near-Earth objects and interstellar objects, is the lead author of a paper in The Astrophysical Journal Letters that describes the discovery and its implications. It’s the first peer-reviewed paper based on data from Rubin’s LSST Camera in Chile.

2025 MN45 is one of more than 2,100 solar system objects that were detected during the observatory’s commissioning phase. Over time, the LSST Camera tracked variations in the light reflected by those objects. Greenstreet and her colleagues analyzed those variations to determine the size, distance, composition and rate of rotation for 76 asteroids, all but one of which are in the main asteroid belt between the orbits of Mars and Jupiter. (The other asteroid is a near-Earth object.)

The team found 16 “super-fast rotators” spinning at rates ranging between 13 minutes and 2.2 hours per revolution — plus three “ultra-fast rotators,” including 2025 MN45, that make a full revolution in less than five minutes.

Get the full story on GeekWire
Categories
Universe Today

A plan to manage asteroid mining wins Schweickart Prize

Illustration: Mining spacecraft on asteroid with Earth in background
An artist's conception shows an asteroid mining operation with Earth in the background. (Credit: NASA)

The $10,000 Schweickart Prize is awarded every June to mark Asteroid Day and draw attention to risks from above — and this year’s prize is going to a team of students who are proposing a panel to focus on what could happen when we start tinkering with asteroids.

The winning proposal calls for the creation of a Panel on Asteroid Orbit Alteration, which would address the risks posed by unintended asteroid orbit changes. Such changes could crop up during asteroid mining operations, research missions to asteroids, or even when a spacecraft malfunctions and kicks an asteroid onto a perilous path.

Continue reading “A plan to manage asteroid mining wins Schweickart Prize”
Categories
Universe Today

Lucy probe snaps closeup of weirdly shaped asteroid

Closeup of asteroid Donaldjohanson
NASA's Lucy probe captured this view of the asteroid Donaldjohanson from about 660 miles away. (NASA / Goddard / SwRI / JHUAPL / NOIRLab)

NASA’s Lucy spacecraft made a successful flyby of the second asteroid on its must-see list over the weekend, and sent back imagery documenting the elongated object’s bizarre double-lobed shape.

It turns out that asteroid Donaldjohanson — which was named after the anthropologist who discovered the fossils of a human ancestor called Lucy — is what’s known as a contact binary, with a couple of ridges in its narrow neck. In today’s image advisory, NASA compares the ridged structure to a pair of nested ice cream cones.

Continue reading “Lucy probe snaps closeup of weirdly shaped asteroid”
Categories
Universe Today

Asteroid will miss Earth — but may set off lunar light show

Graphic: Diagram showing line of probability for 2024 YR4 collision with moon
The yellow streak represents possible locations of asteroid 2024 YR4 on Dec. 22, 2032, as calculated on April 2, 2025. (NASA / JPL / CNEOS)

Although astronomers have ruled out a smash-up between Earth and an asteroid known as 2024 YR4 in the year 2032, the building-sized space rock still has a chance of hitting the moon. In fact, the chances — slight as they are — have doubled in the past month.

The latest assessment from NASA puts the probability of a lunar impact on Dec. 22, 2032, at 3.8%. That’s an increase from the 1.7% figure that was reported in February. Since then, further observations made by ground-based telescopes and NASA’s James Webb Space Telescope have somewhat reduced the uncertainty over where exactly the asteroid will be when its orbit intersects Earth’s orbital path (and the moon’s).

Over the course of observing 2024 YR4, astronomers had set the chances of a collision with Earth in 2032 as high as 2.3% — but that wasn’t because of what the asteroid may or may not do over the next seven years. Instead, it merely reflected how little was known about YR4’s precise orbit. The chances of an Earth impact fell to zero more than a month ago as more observations came in.

Something similar might well happen to the chances for a lunar impact. If the calculations progress the way they usually do for asteroid orbits, the chances may go up for a while but then vanish completely. Stay tuned: The Webb telescope is due to check in again with YR4 in late April or early May.

What if it turns out that the asteroid is truly on course to hit the moon? “There might be an unbelievable light show,” former NASA astronaut Ed Lu, who’s in charge of the B612 Foundation’s Asteroid Institute, said last week at the University of Washington.

Continue reading “Asteroid will miss Earth — but may set off lunar light show”
Categories
Universe Today

Hera probe heads off to investigate asteroid smash-up

Hera liftoff on SpaceX Falcon 9 rocket
A SpaceX Falcon 9 rocket launches the Hera spacecraft into space from its Florida pad. (Credit: SpaceX)

The European Space Agency’s Hera spacecraft is on its way to do follow-up observations of Dimorphos, two years after an earlier probe knocked the mini-asteroid into a different orbital path around a bigger space rock.

Scientists say the close-up observations that Hera is due to make millions of miles from Earth, starting in 2026, will help them defend our planet from future threats posed by killer asteroids.

“Hera’s ability to closely study its asteroid target will be just what is needed for operational planetary defense,” Richard Moissl, who heads ESA’s Planetary Defense Office, said today in a news release. “You can imagine a scenario where a reconnaissance mission is dispatched rapidly, to assess if any follow-up deflection action is needed.”

The car-sized probe lifted off from Cape Canaveral Space Force Station in Florida atop a SpaceX Falcon 9 rocket at 10:52 a.m. ET (7:52 a.m. PT) today, just as Hurricane Milton was approaching from the Gulf of Mexico. The day before the launch, forecasters put the chances of acceptable weather at just 15 percent.

Nevertheless, SpaceX persisted.

Continue reading “Hera probe heads off to investigate asteroid smash-up”
Categories
Universe Today

Schweickart Prize boosts new way to find killer asteroids

2013 Chelyabinsk meteor trail
This vapor trail was left behind by an asteroid that zoomed over the Siberian city of Chelyabinsk in 2013. (Credit: Alex Alishevskikh via NASA)

Every year on June 30, Asteroid Day marks the anniversary of a meteor airburst in 1908 that leveled hundreds of square miles of Siberian forest land. But a more recent meteor blast — and a new plan for getting advance warning of the next one — is receiving some added attention for this year’s Asteroid Day.

The first-ever Schweickart Prize, named in honor of Apollo 9 astronaut Rusty Schweickart, is going to a researcher who has proposed a system for spotting potentially threatening asteroids coming at us from a difficult-to-monitor zone between Earth and the sun. It was just such an asteroid that blew up over the Siberian city of Chelyabinsk in 2013, spraying debris that injured about 1,500 people and caused an estimated $33 million in property damage.

The proposal from astronomy Ph.D. student Joseph DeMartini calls for setting up a consortium of ground-based observatories, anchored by the Vera C. Rubin Observatory in Chile, to focus on the twilight sky just after sunset and just before sunrise. Those are the times of day when astronomers have the best chance of finding sunward near-Earth objects (NEOs) that spend much of their time within Earth’s orbit.

“It’s a very interesting proposal that we hope gets picked up,” Rusty Schweickart said.

Continue reading “Schweickart Prize boosts new way to find killer asteroids”
Categories
GeekWire

Asteroid hunters make 27,500 new finds in old data

Asteroid orbital tracks
This visualization shows trajectories for scores of asteroids. (B612 Asteroid Institute / UW Dirac Institute / OpenSpace Project)

A team of asteroid hunters that includes researchers at the University of Washington says it has identified 27,500 new, high-confidence asteroid discovery candidates — not by making fresh observations of the night sky, but by sifting through archives of astronomical data.

The weeks-long database search was conducted by the Asteroid Institute, a program of the nonprofit B612 Foundation, in partnership with UW’s DiRAC Institute and Google Cloud.

The two institutes developed a program called THOR, which stands for “Tracklet-less Heliocentric Orbit Recovery.” THOR runs on a cloud-based, open-source platform known as ADAM (“Asteroid Discovery Analysis and Mapping”). The program can analyze the positions of millions of moving points of light observed in the sky over a given period of time, and link those points together in ways that are consistent with orbital paths.

Google Cloud’s Office of the CTO collaborated with the Asteroid Institute to fine-tune its algorithms for Google Cloud. The project analyzed 5.4 billion observations drawn from the NOIRLab Source Catalog Data Release 2.

“What is exciting is that we are using electrons in data centers, in addition to the usual photons in telescopes, to make astronomical discoveries,” Ed Lu, executive director of the Asteroid Institute, said in a news release.

Most of the 27,500 asteroid discovery candidates are in the main belt, between the orbits of Mars and Jupiter. But the candidates also include more than 100 apparent near-Earth asteroids.

Get the full story on GeekWire
Categories
GeekWire

NASA probe delivers asteroid sample — and moves on

Engineer checks out OSIRIS-REx capsule in Utah desert
Lockheed Martin engineer Victoria Theim checks out the OSIRIS-REx capsule after its landing in Utah. (NASA Photo / Keegan Barber)

Seven years and 4 billion miles after its launch, NASA’s OSIRIS-REx spacecraft has successfully dropped off a capsule containing a precious sample of one near-Earth asteroid — and is now on course to rendezvous with another one in 2029.

Rocket thrusters built at Aerojet Rocketdyne’s facility in Redmond, Wash., have been guiding the bus-sized probe every step of the way.

Today marked the climax of OSIRIS-REx — which stands for Origins, Spectral Interpretation, Resource Identification and Security-Regolith Explorer. The billion-dollar mission is designed to let scientists examine pristine stuff from a space rock that could shed light on the chemistry of the primordial solar system, and give them a better idea of the resources that could someday be gleaned from asteroids.

Get the full story on GeekWire
Categories
GeekWire

Asteroid-hunting algorithm passes a tricky test

Bird's eye view showing orbital paths for Earth and asteroid 2022 SF289 at closest approach
A bird’s-eye view of the solar system shows the orbital path for Earth in blue and the projected orbit for the asteroid known as 2022 SF289 at its closest approach in green. Orbits of Venus and Mars are shown in orange and red. (Credit: Joachim Moeyens / UW / OpenSpace)

A new technique for finding potentially hazardous asteroids before they find us has chalked up its first success.

In this case, the asteroid isn’t expected to threaten Earth anytime in the foreseeable future. But the fact that the technique — which uses a new computer algorithm called HelioLinc3D — actually works comes as a confidence boost as astronomers get set to step up the asteroid hunt with the Vera C. Rubin Observatory in Chile.

The University of Washington’s DiRAC Institute will play a leading role in analyzing the data from the Rubin Observatory, and HelioLinc3D is meant to make the job easier.

It’ll be another couple of years before the Rubin Observatory starts surveying the skies, but researchers put HelioLinc3D to the test by feeding it data from the NASA-funded Asteroid Terrestrial-impact Last Alert System, or ATLAS.

During the July 18 test run, the algorithm combined fragments of ATLAS data from four nights of observations to identify an asteroid that had been previously missed.

The asteroid, designated 2022 SF289 and described in a Minor Planet Electronic Circular, is thought to be about 600 feet wide. That’s wide enough to cause widespread destruction on Earth in the event of an impact. The good news is that projections of 2022 SF289’s orbital path show it staying 140,000 miles away from Earth at its closest. Nevertheless, the space rock fits NASA’s definition of a potentially hazardous asteroid because of its estimated size and the fact that it can come within 5 million miles of our planet.

UW researcher Ari Heinze, the principal developer of HelioLinc3D, said the algorithm’s success should carry over to the Rubin Observatory’s future database.

“By demonstrating the real-world effectiveness of the software that Rubin will use to look for thousands of yet-unknown potentially hazardous asteroids, the discovery of 2022 SF289 makes us all safer,” Heinze said in a news release.

Get the full story on GeekWire
Categories
Universe Today

Cosmic threats lead the list of public’s space concerns

2013 Chelyabinsk meteor trail
This vapor trail was left behind by an asteroid that zoomed over the Siberian city of Chelyabinsk in 2013. (Credit: Alex Alishevskikh via NASA)

Sending astronauts to the moon is OK — but more Americans think NASA should instead put a high priority on monitoring outer space for asteroids and other objects that could pose a threat to Earth, according to the Pew Research Center’s latest survey focusing on Americans’ perspectives on space policy.

The nonprofit research center’s report was released today, on the 54th anniversary of the Apollo 11 moon landing. It follows up on a similar survey that was done in 2018 to mark NASA’s 60th anniversary.

The earlier survey suggested that slightly more Americans saw monitoring climate change as a top priority (63% vs 62%). This year, the rankings were reversed, with 60% putting cosmic threats at the top of their list, as opposed to 50% for climate concerns. Only 12% of the respondents said sending astronauts to explore the moon was a top priority, and 11% said sending astronauts to Mars led their list. That translates into less support than those missions had five years ago.

The survey, conducted online from May 30 to June 4, is based on responses from 10,329 randomly selected U.S. adults who are part of the research center’s online panel. The results were weighted to reflect current demographics.

Continue reading “Cosmic threats lead the list of public’s space concerns”