quote: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).
Het lijkt er langzaam te gaan, is dit niet ruimteafval?quote:Op woensdag 28 december 2016 13:49 schreef Frutsel het volgende:
gezien vanuit Guatemala & Nicaragua
quote: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).
quote: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
quote: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."
Over 2 dagen of over 12 dagen volgens dat artikel, vanaf nu.quote:Op donderdag 26 januari 2017 20:55 schreef Frutsel het volgende:
Oh oh.. volgende maand is ut raak....
quote: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.
quote: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.
quote: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