Astronomers zero in on blue-hued asteroid


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Researchers might have gotten one step nearer to determining the mysterious nature of an asteroid dubbed 3200 Phaethon.

College of Arizona Ph.D. scholar Teddy Kareta headed up a bunch of individuals finding out the house rock. He introduced their analysis Tuesday in Tennessee, the place the American Astronomical Society’s Division for Planetary Science is holding its annual assembly.

3200 Phaethon, nevertheless, stood out lengthy earlier than Kareta’s group examined it.

The asteroid – which is behind the Geminid meteor bathe – was discovered within the heavens in 1983. Earlier than then, astronomers solely linked meteor showers to comets, Kareta wrote in a information launch.

“Once they discovered Phaethon, it simply seems to be like a dot within the sky,” Kareta instructed Fox Information. “It doesn’t have comet-like actions.”


It’s additionally notable for its colour: astronomers found 3200 Phaethon was a novel blue colour after it was initially discovered, he defined.

“One in 20 asteroids are blue,” Kareta stated. “Even fewer are blue like Phaethon.”

Kareta’s group received to look at the house rock in mid-December 2017.

Researchers used NASA’s Infrared Telescope Facility in Hawaii to take a look at the daylight mirrored off the item, he defined. After recording information, they checked out a “complimentary research” from 2007 which concerned comparable analysis performed in Arizona.

For Kareta, there have been two key takeaways.

Individuals have tried connecting 3200 Phaethon to different asteroids – like one other blue-hued one, dubbed 2 Pallas – due to its reflectivity and colour, he defined.

“Apparently, we discovered Phaethon to be even darker than had been beforehand noticed, about half as reflective as Pallas,” Kareta stated in a written assertion. “This makes it tougher to say how Phaethon and Pallas are associated.”

The group might not know the actual connection, however they nonetheless have some concepts. Kareta stated the group thinks 3200 Phaethon “could be associated or have damaged off from” the opposite house object.


Kareta’s group additionally observed its blue colour was even all through. This, Kareta stated, might be “as a result of it’s been cooked a lot,” given how shut the item will get to the solar throughout orbit.

The researcher acknowledged it’s exhausting to categorise 3200 Phaethon’s true identification.

“I can’t say if we’ve solved this factor, however I feel we’re nearer than ever,” Kareta stated, including it’s “most secure” to explain the item as “an asteroid with comet-like properties.”

Regardless, he thinks it is “far out.”

“It doesn’t actually matter what you name it,” he stated. “It’s simply cool.”

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