In our solar system, there are at least four objects from interstellar space. This claims two researchers from Harvard University based on computer models.
The objects – 2011 SP25, RR2 2017, 2017 and 2018 SV13 TL6 – are usually somewhere between Jupiter and Neptune.
If they approach the sun very close, they also come near earth.
Harvard scientists Amir Siraj and Abraham Loeb have published their research in the journal Monthly Notices of the Royal Astronomical Society.
“We find that there should be hundreds of Oumuamua-size interstellar objects identifiable by Centaur-like orbits,” write the scientists.
1I/2017 U1 Oumuamua, the first interstellar object was discovered on October 19, 2017, by the Pan-Starrs telescope of the University of Hawaii.
There were, according to the researchers at least 66 other interstellar objects with a diameter ranging from 100 meters to 10 kilometers.
The LSST (Large Synoptic Survey Telescope), currently being built in Chile, should be able to spot these objects.
“The Sun-Jupiter system acts as a fishing net that collects interstellar objects,” Harvard University astrophysicist Abraham Loeb told me,” says Loeb. “At any given time, there are a few thousand trapped objects within the solar system.”
The four objects have been identified as possible interstellar objects. Siraj said: “We do not know if they are comets, asteroids, or artifacts.”
He noted that one of the four, 2018 TL6 comes close to the earth in 20 years.
“We do not have any evidence that these [four] objects are unnatural at this point,” Siraj said.
Meanwhile, NASA’s infrared Spitzer telescope has determined Oumuamua shows normal cometary activity, says Loeb.
In addition, the surface of the mysterious cigar is 10 times as reflective as a typical asteroid.
According to Loeb does it not an ordinary comet or asteroid, but artificial.