Close encounters #3: Asteroiden scheren langs de aarde

Meteor Fireball December 6 2016 Exploding off the Norwegian Coast

Huge fireball explodes over Norway on December 6, 2016 turning night into day

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A large meteor exploded over the Norwegian Sea at 04:15 UTC on December 6, 2016. The event lit up the sky over Norway and was followed by several sonic booms.

The fireball started at 81.4 km (50.6 miles) and ended at 24.4 km (15.2 miles), according to the latest analysis by the Norwegian Meteor Network.

It had an estimated entry velocity of 13.6 km/s and mass of at least 1 000 kg (2 200 lbs).

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Newly discovered asteroid will have flyby Earth
A newly discovered Apollo-class asteroid 2017 BX will flyby Earth at 0.68 LD (261 120 km / 162 252 miles) from the surface of our planet on January 25, 2017. Its estimated size is between 4 and 14 m (13 and 46 feet).

At the time of its closest approach to Earth - 04:45 UTC on January 25 - asteroid 2017 BX will flyby at 0.68 LD (261 120 km / 162 252 miles) from the surface of Earth with an estimated velocity of 7.44 km/s.

2017 BX was first observed at Pan-STARRS 1, Haleakala on January 20, 2017.

The next time this object comes close to our planet will be on January 12, 2070. Its nominal distance at the time of closest approach will be 37.9 LD (14553603 km / 9043190 miles).

As of January 17, 2017, there are 15 564 known near-Earth objects. On January 1, 2000, this number was only 935. Ten years before that, on January 1, 1990, we knew only for 180 near-Earth objects.

The following chart shows the current total number of known near-Earth asteroids (as of January 21, 2017) grouped according to their estimated sizes. The first size bin represents NEAs smaller than ~30 m (98 feet) in diameter. The last bin represents NEAs with diameters larger than ~1km (0.62 miles).

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A bright meteor streaked through the sky over the eastern United States around 09:08 UTC (04:08 local time) on January 25, 2017. The event lasted a couple of seconds and was caught on security camera in Huntsville, North Carolina.

By 17:27 UTC, the American Meteor Society received 12 reports about the fireball. It was seen from Kentucky, Tennessee, South Carolina, North Carolina, Virginia and Maryland. There was no sound associated with the event.

Several people from Mount Holly, NC reported a loud noise between 04:10 and 04:15 local time. One woman said it sounded like a large truck dropping a dumpster.

Jim Craig, planetarium director at The Schiele Museum in Gastonia, said the "sonic boom” heard all across Mount Holly came from a meteor breaking up in the atmosphere

1-25-2017 (4:08AM) - Fireball in the Sky over Neighbors House

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ASTEROID WARNING: Empire State Building-sized space rock may hit Earth, says NASA

The asteroid, known as 2015 BN509, after the date of its discovery, is on a NASA list of potentially hazardous asteroids that could one day threaten the planet.

It flew past Earth in January at nearly 44,000mph.

Luckily this time it was 3.3 million miles away, but asteroids on the list are there because of the chance of a direct strike in coming years, and uncertainty over there orbits.

The 2015 BN509 asteroid is at least 200 metres wide and 400 metres long.

At that size, a direct hit could destroy a whole country or region.

It was filmed hurtling through empty space by the Arecibo Observatory, which is a giant radio telescope , as it came past last month.

NASA is currently trying to chart all asteroids that pose a risk to Earth, but still has no idea where around 80 percent of those of a similar size to 2015 BN509 are.

It is also trying to devise ways to deflect an asteroid, should one be heading for us.

Currently there is no tested way opt dealing with one, but ideas include using the gravity of a spacecraft to knock it off course.

However, NASA does have an asteroid early warning system called Scout.

It can work out the flight path of an incoming asteroid within 10 minutes of first identifying it.

Paul Chodas from NASA's Jet Propulsion Laboratory, which runs the Scout programme, said: "When a telescope first finds a moving object, all you know is it's just a dot, moving on the sky.

"You have no information about how far away it is.

"The more telescopes you get pointed at an object, the more data you get, and the more sure you are how big it is and which way it's headed. But sometimes you don't have a lot of time to make those observations."

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Newly discovered asteroid does close flyby
A newly discovered asteroid named 2017 DG16 will flyby Earth at a very close distance of 0.34 LD (130 560 km / 81 126 miles) from the surface of our planet at 21:08 UTC on February 23, 2017. This is the fifth known near-Earth asteroid to flyby Earth within 1 lunar distance since January 8, 2017.

2017 DG16 was first observed by Mt. Lemmon Survey on February 21. The estimated size of this asteroid is between 2 and 8 m (6.5 - 26.2 feet). It will flyby Earth at a speed (relative to the Earth) of 6.91 km/s.

This object belongs to the Apollo group of asteroids, Earth-crossing asteroids that have an orbital semi-major axis greater than that of the Earth (> 1 AU) but perihelion distances less than the Earth's aphelion distance (q < 1.017 AU).

This is the fifth known near-Earth asteroid to flyby Earth within 1 lunar distance since January 8, 2017, and the sixth since November 24, 2016. You can find them all in our Near-Earth Objects category.

As of February 19, 2017, there are 15 761 known near-Earth objects. 8 507 of them belong to the Apollo group of asteroids.

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Newly discovered asteroid makes very close flyby to earth: 0,03 LD
A newly discovered asteroid designated 2017 GM will flyby Earth at a very close distance of 0.03 LD (~11 520 km / 7 158 miles) from the surface of our planet on April 4, 2017. This is the 15th known asteroid to flyby Earth within 1 lunar distance since the start of the year and the closest one.

2017 GM belongs to the Apollo group of asteroids. Its estimated size is between 2.8 - 6.3 m (9 - 20 feet).

This small asteroid, first observed at Mt. Lemmon Survey on April 3, will make its closest approach to the Earth at 10:31 UTC on April 4 at a speed (relative to the Earth) of 18.48 km/s.

This is the 15th known asteroid to pass within 1 lunar distance since January 9, 2017 and the closest one. You can find them all in our Near-Earth Objects category.

As of March 31, 2017, there are 16 062 known near-Earth objects, 15 956 of them are near-Earth asteroids. 8 696 belong to the Apollo group of asteroids.

Since the start of the year, we have discovered 355 new near-Earth objects. All of them are asteroids.

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Earth Faces an Increased Risk of Being Hit by an Asteroid, Astronomers Warn

Large asteroids may be lurking undiscovered within a meteoroid stream whose particles are hitting Earth, and scientists are urging a concentrated search for them.

Earth may be threatened by a newly discovered branch of a stream of meteoroids, increasing the risk that the planet will be struck by a meteoroid or asteroid.

A team of astronomers from the Czech Academy of Sciences announced the findings on Tuesday after studying the Taurid meteoroid stream. The stream produces a meteor shower that usually has a long period of activity in October and November and produces a low number of meteors. The meteors — light phenomena that are seen when a meteoroid enters the planet’s atmosphere and vaporizes, also referred to as “shooting stars” — occur when Earth’s orbit plows into the stream of debris left behind by Comet Encke.

Most of these particles are quite tiny and pose no threat whatsoever, but the Czech astronomers have tracked a new branch of the stream from which particles are intersecting with the planet. The branch includes two asteroids with diameters of between 200 and 300 meters (roughly 650-1000 feet). These asteroids are not themselves on a collision course with Earth, but their identification suggests that there may be other asteroids of this size or larger lurking undiscovered within this stream.

As such, the astronomers are urging a concentrated search for more Taurid asteroids, to see if any potentially threatening ones exist.

“Since asteroids of sizes of tens to hundreds meters pose a threat to the ground even if they are intrinsically weak, impact hazard increases significantly when the Earth encounters the Taurid new branch every few years,” they write in the journal Astronomy & Astrophysics. “Further studies leading to [a] better description of this real source of potentially hazardous objects, which can be large enough to cause significant regional or even continental damage on the Earth, are therefore extremely important.”

It’s worth noting, however, that no threatening objects have yet been discovered. Though the prospect of continental damage and regional catastrophe coming from space is alarming, more observations will be needed before drawing conclusions based on the Czech team’s research.

NASA is regularly working to anticipate the possible collision of a massive cosmic particle with Earth and assess any potential impact risks. It operates a collision monitoring system called Sentry that routinely scans for asteroids and determines the likelihood of impact over the next 100 years. It also freely catalogs these rocky bodies at the JPL Small-Body Database Browser.

The debris stream from Comet Encke is influenced in part by the gravity of Jupiter, a massive gas giant planet that is known to influence the orbits of comets and asteroids in that region of the solar system. As such, from time Jupiter’s gravity can redirect the debris so that more particles hit the Eart

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Newly discovered asteroid flew past Earth at 0,31 LD
A newly discovered asteroid designated 2017 VL2 flew past Earth at 0.31 LD / 0.00079 AU (~118 182 km / 73 435 miles) on November 9, 2017, one day before it was discovered. This is the 47th known asteroid to flyby Earth within 1 lunar distance since the start of the year, and one of the largest.

2017 VL2 belongs to the Apollo group of asteroids. It was first observed at ATLAS-MLO, Mauna Loa at 11:24 UTC on November 10.

Its estimated diameter is between 16 and 32 m (52 - 105 feet) and it flew past Earth at a speed (relative to the Earth) of 8.73 km/s at 09:50 UTC ± < 00:01.

2017 VL2 is the 47th known asteroid to flyby Earth within 1 lunar distance since the start of the year, and one of the 7 largest.

This object won't come this close to Earth at least until 2125.

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Asteroïde vliegt begin februari “op relatief dichte afstand” van de Aarde

Een asteroïde zal volgens het Amerikaanse ruimtevaartbureau NASA begin februari op relatief dichte afstand voorbij de Aarde vliegen. Het hemellichaam met de naam 2002 AJ129 zal op 4 februari om 22.30 uur op ongeveer 4,2 miljoen kilometer voorbij onze planeet razen. Dat is ongeveerde het tienvoudige van de afstand tussen de Aarde en de Maan, aldus NASA.
Met een diameter van rond een kilometer is de in 2002 door een observatorium op Hawaï ontdekte planetoïde van middelgroot kaliber. Hij zal de Aarde met een relatief hoge snelheid van ongeveer 34 kilometer per seconde (122.400 kilometer per uur) passeren.

Er is geen gevaar voor onze planeet. “We houden deze asteroïde al 14 jaar in het oog en we kunnen zijn baan erg nauwkeurig berekenen”, zei NASA-expert Paul Chodas. “Onze berekeningen voorspellen dat er geen enkel kans is dat 2002 AJ129 op 4 februari of op een ander tijdstip in de komende 100 jaar zal botsen met de Aarde”.

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[url='Potentially hazardous': 450m-wide asteroid to fly by Earth tonight]https://au.news.yahoo.com/a/39427507/empire-state-building-sized-asteroid-2017-vr12-set-to-pass-earth/[/url]

An enormous asteroid the size of the Empire State Building is set to fly past Earth on Wednesday night.

The pass of a dangerously-sized asteroid to Earth was used to test early warning systems after a similarly-sized object caused widespread damage in Siberia in 2013.
Named 2017 VR12, the asteroid is expected to pass within 1,400,000km of Earth – three times the distance between our planet and the moon – and has a diameter of between 213 and 457 metres meaning it could be bigger than New York's Empire State Building.

NASA has labelled it a "potentially hazardous asteroid" due its close proximity to Earth. Asteroids are described as 'hazardous' by the space agency if they come within 7,400,200km of our planet. The Moon is 384,400km away, or one lunar distance.


The orbit of asteroid 2017 VR12 will come within a 3.8 lunar distance from Earth. Source: Facebook / Northolt Branch Observatories

The asteroid was previously estimated to be about 470 metres wide.

If the asteroid was as big as the first estimate, it could have a surface area of almost 55 acres. The newer estimate would give it a surface area of just over 15 acres.

According to NASA, 2017 VR12 was first discovered by the Pan-STARRS 1 telescope in Hawaii on November 10, 2017.

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NASA warns colossal HAZARDOUS asteroid BIGGER than Eiffel Tower heading to Earth TODAY

The newly-discovered space rock – dubbed Asteroid 2018 CB – is expected to zoom past our planet at around 10.30pm GMT.

It will be travelling at a speed close to five miles per second and will pass at a distance of about 39,000 miles.

That’s just one-fifth of the distance from Earth to the Moon and it’s a distance considered incredibly close in space terms.

According to NASA, the chunk of rock is a whopping 40m wide, which would be double the size of the meteor that almost wiped out Chelyabinsk in Russia almost five years ago.

The passing comes just one week after Asteroid 2018 DV1 soared past Earth at a distance of just 27,000 miles above the surface.

Just yesterday, Daily Star Online revealed how space boffins were drawing up plans to fire a nuclear weapon at an asteroid amid fears Earth could be hit by a giant space rock.

Asteroid 2018 CB has been classed by NASA as “potentially hazardous” because of the sheer proximity from Earth.

But thankfully, experts predict there is no threat of it hitting our planet.

"Asteroids of this size do not often approach this close to our planet — maybe only once or twice a year," Paul Chodas, manager of the Center for Near-Earth Object Studies at NASA's Jet Propulsion Laboratory in California, said in a statement from the agency.

He added: "Although 2018 CB is quite small, it might well be larger than the asteroid that entered the atmosphere over Chelyabinsk, Russia, almost exactly five years ago, in 2013.”

The asteroid was discovered by the NASA-funded Catalina Sky Survey (CSS) near Tucson, Arizona.

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Bright fireball over Europe, sonic boom reported, meteorites possible

A bright green fireball was observed and captured on camera as it streaked over Hungary and Croatia at 18:49 UTC (20:49 CET) on April 8, 2018. The event lasted about 5 seconds and was followed by sonic booms.

The International Meteor Organization (IMO), received 25 reports by 10:00 UTC, April 9 from people as far west as southern Germany.

According to reports, the event was associated with sonic booms suggesting the meteor penetrated deep into the atmosphere, Severe Weather Europe said.

Due to the brightness and long duration of the event, pieces of this object may have landed somewhere in far northern Croatia.

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Op dinsdag 10 april 2018 00:41 schreef Godshand het volgende:

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Vliegende schotel op de bovenste foto te zien

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Bright fireball over Chinese city of Jinghong

A very bright fireball exploded over the Chinese city of Jinghong in Yunnan Province at 13:40 UTC on June 1, 2018. Locals reported sonic booms associated with the event.

According to witness reports, the event lasted for about 2 seconds and was followed by two sonic booms. This indicates the object penetrated deep into the atmosphere and that some of its pieces might have survived the entry.

The director of the Xishuangbanna State Seismological Bureau, Ma Zhengyin, said the object entered at an angle of 70 degrees, common for meteors. However, both Zhengyin and Wang Xiaobin, a researcher at the Yunnan Observatory of Chinese Academy of Sciences, said they can't be sure it was a meteor because the video was short and there was no obvious path.

According to local media reports, people living in Dai Autonomous Prefecture of Xishuangbanna, Yunnan Province are looking for possible meteorites on the ground.

AMS event #1923-2018

Fireball over China