Tuesday, 23 January 2018

Asteroid 2018 AG4 passes the Earth.

Asteroid 2018 AG4 passed by the Earth at a distance of about 539 000 km (1.40 times the average distance between the Earth and the Moon, or 0.36% of the distance between the Earth and the Sun), slightly after 10.40 am GMT on Wednesday 17 January 2018. There was no danger of the asteroid hitting us, though were it to do so it would not have presented a significant threat. 2018 AG4 has an estimated equivalent diameter of 11-36 m (i.e. it is estimated that a spherical object with the same volume would be 11-36 m in diameter), and an object of this size would be expected to explode in an airburst (an explosion caused by superheating from friction with the Earth's atmosphere, which is greater than that caused by simply falling, due to the orbital momentum of the asteroid) in the atmosphere between 30 and 12 km above the ground, with only fragmentary material reaching the Earth's surface.

The calculated orbit of 2018 AG4. Minor Planet Center.

 2018 AG4 was discovered on 14 January 2018 (three days before its closest approach to the Earth) by the University of Arizona's Catalina Sky Survey, which is located in the Catalina Mountains north of Tucson. The designation 2018 AG4 implies that it was the 107th asteroid (asteroid G4) discovered in the first half of January 2018 (period 2018 A).

2018 AG4 has a 514 day orbital period and an eccentric orbit tilted at an angle of 10.7° to the plane of the Solar System, which takes it from 0.89 AU from the Sun (i.e. 89% of he average distance at which the Earth orbits the Sun) to 1.62 AU from the Sun (i.e. 162% of the average distance at which the Earth orbits the Sun, and more distant from the Sun than the planet Mars). It is therefore classed as an Apollo Group Asteroid (an asteroid that is on average further from the Sun than the Earth, but which does get closer). This means that the asteroid has occasional close encounters with the Earth, with the last thought to have occurred in July 2011 and the next predicted in July this year. The asteroid also has occasional close encounters with the planet Mars, with the last thought to have encountered in November 2012 and the next predicted for July this year.

See also...

http://sciencythoughts.blogspot.co.uk/2018/01/asteroid-2018-au2-passes-earth.htmlhttp://sciencythoughts.blogspot.co.uk/2018/01/fireball-meteor-over-michigan-causes.html
http://sciencythoughts.blogspot.co.uk/2018/01/asteroid-2018-at2-passes-earth.htmlhttp://sciencythoughts.blogspot.co.uk/2018/01/comet-c2016-a1-panstarrs-makes-its.html
http://sciencythoughts.blogspot.co.uk/2018/01/asteroid-2017-yq6-passes-earth.htmlhttp://sciencythoughts.blogspot.co.uk/2018/01/asteroid-2007-ag-passes-earth.html
Follow Sciency Thoughts on Facebook.

2 comments:

  1. ASS..WR.WB.SAYA IBU RISKY TKI BRUNAY DARUSALAM INGIN BERTERIMA KASIH BANYAK KEPADA EYANG WORO MANGGOLO,YANG SUDAH MEMBANTU ORANG TUA SAYA KARNA SELAMA INI ORANG TUA SAYA SEDANG TERLILIT HUTANG YANG BANYAK,BERKAT BANTUAN EYANG SEKARAN ORANG TUA SAYA SUDAH BISA MELUNASI SEMUA HUTAN2NYA,DAN SAWAH YANG DULUNYA SEMPAT DI GADAIKAN SEKARAN ALHAMDULILLAH SUDAH BISA DI TEBUS KEMBALI,ITU SEMUA ATAS BANTUAN EYANG WORO MANGGOLO MEMBERIKAN ANGKA RITUALNYA KEPADA KAMI DAN TIDAK DI SANGKA SANGKA TERNYATA BERHASIL,BAGI ANDA YANG INGIN DIBANTU SAMA SEPERTI KAMI SILAHKAN HUBUNGI NO HP EYANG WORO MANGGOLO (0823-9177-2208) JANGAN ANDA RAGU ANGKA RITUAL EYANG WORO MANGGOLO SELALU TEPAT DAN TERBUKTI INI BUKAN REKAYASA SAYA SUDAH MEMBUKTIKAN NYA TERIMAH KASIH
    NO HP EYANG WORO MANGGOLO (0823-9177-2208) 
    BUTUH ANGKA GHOIB HASIL RTUAL EYANG WORO MANGGOLO
    DIJAMIN TIDAK MENGECEWAKAN ANDA APAPUN ANDA MINTA INSYA ALLAH PASTI DIKABULKAN BERGAUNLAH SECEPATNYA BERSAMA KAMI JANGAN SAMPAI ANDA MENYESAL 
    >>> TOTO MALAYSIA KLIK DISINI <<<

    angka;GHOIB: singapura
    angka;GHOIB: hongkong
    angka;GHOIB; malaysia
    angka;GHOIB; toto magnum
    angka”GHOIB; laos…
    angka”GHOIB; macau
    angka”GHOIB; sidney
    angka”GHOIB: vietnam
    angka”GHOIB: korea
    angka”GHOIB: brunei
    angka”GHOIB: china
    angka”GHOIB: thailand
















    ReplyDelete

  2. ALL THANKS TO UPSTART LOAN AM NOW FINANCIALLY STABLE . upstartloan@yahoo.com
    I am Michelle Huxford from Casper, Wyoming. I was in a very chronic financial issue and terminal health situation some few weeks back. After all my search for assistance from friends and neighbors proved abortive, I feel there was no one who truly cares. I became so emaciated due to lack of good food and my 2 kids age 5 and 8 were not also good looking due to lack of proper care as a result of finance. One faithful morning I saw an old time friend of my late husband and I told him all I have been going through and he said the only way he could help was to direct me to a good loan agency that also helped him, He explained to me on how he was financially down and how he got boosted by this loan agency UPSTART LOAN INC ( upstartloan@yahoo.com ) who grant him 245,000 USD loan at an affordable rate. He further assured me that they were the only legit loan firm he found in the quest of seeking for loan after been scammed by various fake loan lenders online. He gave me their email: upstartloan@yahoo.com or text/call (574) 301-1639, That was how i applied and was also granted a loan and my life changed for the good. CONTACT THE ONLY GENUINE LENDERS( UPSTART LOAN INC) VIA email: upstartloan@yahoo.com or call +1 (574) 301-1639 to resolve your financial mess.

    ReplyDelete