Wanderer from another star system

❝ Telescopes only picked it up a week ago, but it’s likely been traveling through interstellar space for millions of years.

For centuries, skywatchers have chronicled the comings and goings of thousands of comets. Every one of them has come from someplace in our own solar system, either the Kuiper Belt beyond Neptune or the much more distant Oort Cloud at the fringes of the Sun’s realm.

But an object swept up just a week ago by observers using the PanSTARRS 1 telescope atop Haleakala on Maui has an extreme orbit — it’s on a hyperbolic trajectory that doesn’t appear to be bound to the Sun. Preliminary findings, published earlier today by the International Astronomical Union’s Minor Planet Center, suggest that we are witnessing a comet that escaped from another star

❝ Now it’s headed out of the solar system, never to return. It passed closest to Earth on October 14th at a distance of about 24,000,000 km (15,000,000 miles), and astronomers worldwide have been tracking it in the hopes of divining its true nature — especially whether it’s displaying any cometary activity…

❝ This object entered the solar system moving at 26 km (16 miles) per second. At that speed, in 10 million years it would traverse 8,200,000,000,000,000 km — more than 850 light-years.

I guess this brief look was sufficient. If there is any communication back to intelligent lifeforms, they now know there is little of value here excepting the usual commodities probably found in other solar systems.

Thanks, UrsaRodinia

3 thoughts on “Wanderer from another star system

  1. Space Ace says:

    European Southern Observatory (ESO) observations show first interstellar asteroid is like nothing seen before https://www.eurekalert.org/pub_releases/2017-11/e-eos112017.php
    “Preliminary orbital calculations suggested that the object had come from the approximate direction of the bright star Vega, in the northern constellation of Lyra. However, even travelling at a breakneck speed of about 95 000 kilometres/hour, it took so long for the interstellar object to make the journey to our Solar System that Vega was not near that position when the asteroid was there about 300 000 years ago. `Oumuamua may well have been wandering through the Milky Way, unattached to any star system, for hundreds of millions of years before its chance encounter with the Solar System.
    Astronomers estimate that an interstellar asteroid similar to `Oumuamua passes through the inner Solar System about once per year, but they are faint and hard to spot so have been missed until now. It is only recently that survey telescopes, such as Pan-STARRS, are powerful enough to have a chance to discover them.” See also ESO @ http://www.eso.org/public/about-eso/esoglance/

  2. Rama Lama says:

    Astronomers to Check Mysterious Interstellar Object for Signs of Technology (The Atlantic 12/11/17) https://www.theatlantic.com/science/archive/2017/12/yuri-milner-oumuamua-interstellar-asteroid/547985/ Starting Wednesday at 3 p.m. Eastern Time, the Green Bank Telescope will aim at the first known interstellar object in our solar system. The telescope will observe the asteroid for 10 hours across four bands of radio frequency. The results may be made public within a matter of days.

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