Omuamua -The Interstellar Object
Omuamua was the most recent interstellar object detected while passing through the solar system.
1I/2017 U1 ‘Oumuamua, was discovered on October 19, 2017, by the University of Hawaii’s Pan-STARRS1 telescope, which is funded by NASA’s Near-Earth Object Observations (NEOO) Program, which finds and tracks asteroids and comets in Earth’s neighborhood.
Initially, it was classified as a comet but after some observations like speed and direction of path no signs of cometary activity were revealed as it slingshotted past the Sun on Sept. 9, 2017, at a blistering speed of 196,000 miles per hour (87.3 kilometers per second).
Size, Shape, and specifications
Omuamua was The first confirmed object from another star to visit our solar system, It was looking like a rocky body and somewhat cigar-shaped object, very weird straight and slim shape and its color was reddish hue due to effects of irradiation from cosmic rays over hundreds of millions of years. by its scientists and based on real observations and mathematical modeling it is up to one-quarter mile (400 meters) long and highly elongated—perhaps 10 times as long as it is wide.
It was revealed that omuamua is not a comet because the aspect ratio is greater than that of any asteroid or comet observed in our solar system to date.
It was a very different shaped object and also the studying this object we can predict the formation of the other solar systems
It is rocky, probably metal surface and dense with no water ice over there.
A few large ground-based telescopes continued to track the fading object as it receded from our planet. Two of NASA’s space telescopes (Hubble and Spitzer) tracked the object traveling about 85,700 miles per hour (38.3 kilometers per second) relative to the Sun.
Its outbound path is about 20 degrees above the plane of planets that orbit the Sun. as it leaves our solar system, ‘Oumuamua will head for the constellation Pegasus.
Preliminary orbital calculations suggest that the object came from the approximate direction of the bright star Vega, in the northern constellation of Lyra. However, it took so long for the interstellar object to make the journey―even at the speed of about 59,000 miles per hour (26.4 kilometers per second)―that Vega was not near that position when the ‘Oumuamua was there about 300,000 years ago.
Omuamua was an interstellar object because
1. Its shape is weird and straight and slim
2. With such a large ratio between length and width. The most elongated objects we have seen to date are no more than three times longer than they are wide.
3. Its speed was anonymously high
4. like it was the part of any big object which exploded due to some external force and the omuamua was directed towards our solar system as its directed path was very different.
5. A team of scientist/astronomers led by Karen Meech of the Institute for Astronomy in Hawaii combines the images from the Eso telescope (FORS instrument) and other large telescopes, they used 4 different filters to perform several tests they found that ‘Oumuamua varies in brightness by a factor of 10 as it spins on its axis every (7.3) hours.
6. This type of brightness is very different till now in our solar system.
7. No known asteroid or comet from our solar system varies so widely in brightness.
This is the path for the Omuamua in our solar system.
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