Oumuamua was the first interstellar object detected passing through the Solar System and was believed to be cigar-shaped and about 1000 meters long. Using detailed computer models of asteroidal-type objects between the Sun and Jupiter, two Harvard University researchers find that at least four known objects are likely to have origins from outside our solar system.
Harvard co-authors Amir Siraj and Abraham Loeb believe there should be hundreds of Oumuamua-size interstellar objects identifiable by Centaur-like orbits.
Harvard scientist also wrote that Oumuamua might be an alien solar sail. The object seemed to have very unusual movement. However, we could barely see the object and are making many conjectures from very little data.
The four potentially interstellar objects — 2011 SP25, 2017 RR2, 2017 SV13, and 2018 TL6 — are thought to spend most of their time between the orbits of Jupiter and Neptune. They became trapped in the gravity of our solar system.
They believe there should be hundreds of Oumuamua-size interstellar objects identifiable by Centaur-like orbits.
There should be at least 66 possible other interstellar objects in their calculations, ranging in diameter from roughly 100 meters to 10 kilometers in size.
All of these potential interstellar objects should be detectable by the LSST (Large Synoptic Survey Telescope). The Large Synoptic Survey Telescope (LSST) is a wide-field survey reflecting telescope with an 8.4-meter primary mirror. First light is expected in 2019 and full operations for a ten-year survey will start in January 2022.
They will make passes near Earth over 20 to 120 years. It will be another 20 years until we can photograph one of them unless we send a mission out to check on them.
A Theory Would Be IF Alien Technological Civilizations Are Not Impossible Then A Fraction of Interstellar Objects Are Space Junk from Space Alien Space Programs
This is a theory that I was verbally told to me by Anders Sandberg at the Foresight Vision Weekend yesterday.
Eric Drexler, Toby Ord and Anders are at the Future of Humanity Institute, Oxford University.
I will discuss a bit more of Anders theory in the next article. I will also discuss a planned public bet that Anders Sandberg and another Vision Weekend attendee were planning to make.
The bet relates to the LSST. If Interstellar Objects of Oumuamua are common then in three years when the Large Synoptic Survey Telescope is working, we will see many (hundreds or more of them). It will be a jump up in our ability to see such objects. The bet is if we see a lot of them or not.
A follow-up bet that I am thinking of now relates to what percentage of interstellar objects ends up being alien space junk. Just like our orbits are filled with space debris and our oceans are filled with plastic. Some things are natural and some things are coke bottles or fishing nets in our ocean.