A small asteroid discovered on Saturday morning, June 2, 2018, surprised astronomers when its trajectory suggested it would pass very, very close to Earth just hours after being detected. The object has been given the temporary designation of ZLAF9B2. There are reports of sightings of a bright meteor, as well as a video that may be related to the event, from Barend Swanepoel in South Africa. He reports the video as being:
… taken near my dad’s farm between Ottosdal and Hartebeesfontein.
Another witness in South Africa described the meteor as very bright, and showing a yellow color.
This space rock had an estimated size of only 10-16 feet (3 to 5 meters) in diameter. If it struck (and sometimes they do, and meteorite pieces are found), it was too small to cause serious damages. In contrast, the impressive meteor seen over Chelyabinsk, Russia in February, 2013 was an estimated 60 feet wide (20 meters). It broke windows in six Russian cities and caused more than 1,500 people to seek medical attention, mostly due to injuries from flying glass. The June 2 asteroid wasn’t big enough to do anything like that, but it was big enough to produce a spectacular, very bright meteor.
The 60-inch (1.5-meter) telescope at Mt. Lemmon, which is part of the Catalina Sky Survey in Arizona, was the first to detect asteroid ZLAF9B2 on Saturday morning, according to clocks in North America.
According to NASA/JPL, asteroid ZLAF9B2 approached Earth at 35,344 miles per hour (56,880 km per hour).
Models began suggesting that – in case of impact – the asteroid would enter Earth’s atmosphere somewhere between Indonesia, the Indian Ocean, or South Africa.
It looks like there is a good probability ZLAF9B2 will impact the Earth within the next few hours. (Plot from MPML and Peter Birtwhistle) https://t.co/As7RgDseLA pic.twitter.com/XKktXbLNFn
— Asteroid Initiatives (@AsteroidEnergy) June 2, 2018
Trajectory models suggest small asteroid ZLAF9B2 impacted our atmosphere over South Africa on Saturday, and U.S. government sensors and satellites might confirm the event. Image via https://ift.tt/2LRI6g2
The reported observation of the color yellow in the sighted meteor is of interest because colors in a meteor provide a hint of its composition. Yellow suggest the rock contains sodium, as was also in the 2013 Chelyabinsk meteor.
Small asteroids are difficult to detect. Some space rocks might be dark, and may only reflect a small amount of sunlight as they may already be somewhat close to our planet.
However, as bigger asteroids reflect more light, they are usually detected weeks or months before closest approach.
Confirmation of the event is continuing to trickle in:
Bottom line: Trajectory models suggest small asteroid ZLAF9B2 impacted Earth’s atmosphere over South Africa on Saturday, June 2, 2018.
from EarthSky https://ift.tt/2JfIZ03
A small asteroid discovered on Saturday morning, June 2, 2018, surprised astronomers when its trajectory suggested it would pass very, very close to Earth just hours after being detected. The object has been given the temporary designation of ZLAF9B2. There are reports of sightings of a bright meteor, as well as a video that may be related to the event, from Barend Swanepoel in South Africa. He reports the video as being:
… taken near my dad’s farm between Ottosdal and Hartebeesfontein.
Another witness in South Africa described the meteor as very bright, and showing a yellow color.
This space rock had an estimated size of only 10-16 feet (3 to 5 meters) in diameter. If it struck (and sometimes they do, and meteorite pieces are found), it was too small to cause serious damages. In contrast, the impressive meteor seen over Chelyabinsk, Russia in February, 2013 was an estimated 60 feet wide (20 meters). It broke windows in six Russian cities and caused more than 1,500 people to seek medical attention, mostly due to injuries from flying glass. The June 2 asteroid wasn’t big enough to do anything like that, but it was big enough to produce a spectacular, very bright meteor.
The 60-inch (1.5-meter) telescope at Mt. Lemmon, which is part of the Catalina Sky Survey in Arizona, was the first to detect asteroid ZLAF9B2 on Saturday morning, according to clocks in North America.
According to NASA/JPL, asteroid ZLAF9B2 approached Earth at 35,344 miles per hour (56,880 km per hour).
Models began suggesting that – in case of impact – the asteroid would enter Earth’s atmosphere somewhere between Indonesia, the Indian Ocean, or South Africa.
It looks like there is a good probability ZLAF9B2 will impact the Earth within the next few hours. (Plot from MPML and Peter Birtwhistle) https://t.co/As7RgDseLA pic.twitter.com/XKktXbLNFn
— Asteroid Initiatives (@AsteroidEnergy) June 2, 2018
Trajectory models suggest small asteroid ZLAF9B2 impacted our atmosphere over South Africa on Saturday, and U.S. government sensors and satellites might confirm the event. Image via https://ift.tt/2LRI6g2
The reported observation of the color yellow in the sighted meteor is of interest because colors in a meteor provide a hint of its composition. Yellow suggest the rock contains sodium, as was also in the 2013 Chelyabinsk meteor.
Small asteroids are difficult to detect. Some space rocks might be dark, and may only reflect a small amount of sunlight as they may already be somewhat close to our planet.
However, as bigger asteroids reflect more light, they are usually detected weeks or months before closest approach.
Confirmation of the event is continuing to trickle in:
Bottom line: Trajectory models suggest small asteroid ZLAF9B2 impacted Earth’s atmosphere over South Africa on Saturday, June 2, 2018.
from EarthSky https://ift.tt/2JfIZ03
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