Author Topic: C/2019 Q4 (Borisov): Possibly Another Interstellar Visitor  (Read 126 times)

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C/2019 Q4 (Borisov): Possibly Another Interstellar Visitor
« on: September 14, 2019, 11:02:49 AM »
The speed of this object and angle of its trajectory seem to indicate that it isn't part of our solar system.

"A Second Interstellar Object May Be Streaking through Our Solar System" | Scientific American

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By most estimates, our galaxy is a bustling place. Given its hundreds of billions of stars—each accompanied by whirling planets, asteroids, comets, and more—one would expect objects to occasionally be flung into interstellar space. The first of them was found in 2017: officially called 1I/2017 U1 but better known as ‘Oumuamua, it was discovered by chance as it swooped past our sun on an outbound trajectory that rapidly took it beyond the reach of Earth’s best telescopes. Now astronomers think they have found another outcast wandering the space between the stars. But this time, it may linger slightly longer, offering unprecedented scientific opportunities.

The object was originally labelled gb00234 but has now been provisionally designated C/2019 Q4 (Borisov) by the Minor Planet Center (MPC) at the Center for Astrophysics at Harvard University and the Smithsonian Institution. It was discovered on August 30 by Gennady Borisov, using a homemade telescope in Crimea. Borisov, an amateur astronomer, is one of many hobbyists who scour the skies for undiscovered comets orbiting the sun in our solar system.

“Half a year ago, I made a new telescope. And with the help of it, I discovered this unique comet,” Borisov says. “I was excited about the comet. And of course, I was very surprised by the uniqueness. I would be glad if such an interesting space object gets my name.”

[Continues . . .]




"Newly discovered comet is likely interstellar visitor" | ScienceDaily

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Comet C/2019 Q4 as imaged by the Canada-France-Hawaii Telescope on
Hawaii's Big Island on Sept. 10, 2019.
Image Credit: Canada-France-Hawaii Telescope




The new comet, C/2019 Q4, is still inbound toward the Sun, but it will remain farther than the orbit of Mars and will approach no closer to Earth than about 190 million miles (300 million kilometers).

After the initial detections of the comet, Scout system, which is located at NASA's Jet Propulsion Laboratory in Pasadena, California, automatically flagged the object as possibly being interstellar. Davide Farnocchia of NASA's Center for Near-Earth Object Studies at JPL worked with astronomers and the European Space Agency's Near-Earth Object Coordination Center in Frascati, Italy, to obtain additional observations. He then worked with the NASA-sponsored Minor Planet Center in Cambridge, Massachusetts, to estimate the comet's precise trajectory and determine whether it originated within our solar system or came from elsewhere in the galaxy.

The comet is currently 260 million miles (420 million kilometers) from the Sun and will reach its closest point, or perihelion, on Dec. 8, 2019, at a distance of about 190 million miles (300 million kilometers).

"The comet's current velocity is high, about 93,000 mph [150,000 kph], which is well above the typical velocities of objects orbiting the Sun at that distance," said Farnocchia. "The high velocity indicates not only that the object likely originated from outside our solar system, but also that it will leave and head back to interstellar space."

[Continues . . .]
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Tank

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Re: C/2019 Q4 (Borisov): Possibly Another Interstellar Visitor
« Reply #1 on: September 14, 2019, 12:12:58 PM »
Squeeee!
If religions were TV channels atheism is turning the TV off.
“Religion is a culture of faith; science is a culture of doubt.” ― Richard P. Feynman
'It is said that your life flashes before your eyes just before you die. That is true, it's called Life.' - Terry Pratchett
Remember, your inability to grasp science is not a valid argument against it.

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Re: C/2019 Q4 (Borisov): Possibly Another Interstellar Visitor
« Reply #2 on: September 14, 2019, 01:50:18 PM »
JPL has a cool animation showing the comet's speed and steep approach from outside the plane of the ecliptic:

JPL Small-Body Database Browser: C/2019 Q4 (Borisov)
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Re: C/2019 Q4 (Borisov): Possibly Another Interstellar Visitor
« Reply #3 on: October 15, 2019, 11:58:35 PM »
"Interstellar comet Borisov looks ordinary, making Oumuamua even weirder" | c|net

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One of the first profiles of interstellar comet Borisov has been published, and it looks about the same as most other comets. What it doesn't look like is the first interstellar object, Oumuamua, which made its closest pass by Earth exactly two years ago today.

A paper published Monday in Nature Astronomy lays out the early data on Borisov, which is just the second-ever object seen visiting our solar system from beyond. While scientists will get a better look as the comet comes closer to Earth over the next several weeks, so far it looks to be the same color and size as most ordinary comets. Earlier research also revealed it's behaving in familiar ways with a tail containing some of the same toxic gases we expect from intrastellar comets.

[Continues . . .]

Bonus GIF comparing the paths of Borisov and Oumuamua. Taken from here. You can play around with the view, etc. at that link.

"Religion is fundamentally opposed to everything I hold in veneration — courage, clear thinking, honesty, fairness, and above all, love of the truth."
— H. L. Mencken


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Re: C/2019 Q4 (Borisov): Possibly Another Interstellar Visitor
« Reply #4 on: October 16, 2019, 01:11:18 AM »
Attention all Planets of the Solar Federation
Attention all Planets of the Solar Federation
Attention all Planets of the Solar Federation

We have assumed control.
We have assumed control.
We have assumed control.