An asteroid that recently flew close to Earth looks like ‘Oumuamua – a mysterious “interstellar” object, which some serious scientists consider the messenger of an extraterrestrial civilization.


“It looks very similar” — that’s how astronomers reacted, looking at asteroid 2011 AG5, which they recently took pictures of.

The asteroid was captured at a distance of almost 2 million kilometers – in early February 2023, it passed by Earth. Several images were taken using the 70-meter antenna of the  Goldstone Solar System Radar  in Southern California.

NASA experts first of all drew attention to the elongated shape of this 2011 AG5 – completely unusual for asteroids. It is cigar-shaped, the length (about 600 meters) is five times the diameter.


This gave reason to compare it with that giant “cigar” that flew into the solar system in October 2017. ‘Oumuamua or “Messenger who arrived first from afar” in the literal translation from Hawaiian. The object’s trajectory has extended to other worlds – be it the constellation Virgo, be it the Unicorn, be it the Whale.

Images of 2011 AG5 passing close to Earth in February 2023: elongated as ‘Oumuamua

The “newcomer” was so amazing with its oddities that some quite serious scientists, summing them up, saw signs of intelligent interference in Oumuamua. The “Asteroid” was unnaturally bright – it gleamed like metal, had a complexly shaped surface and, most importantly, periodically accelerated – as if someone was controlling it.

Professor Abraham Avi Loeb, from the Harvard Smithsonian Center for Astrophysics, member of the Presidential Council on Science and Technology of the United States and the “leader” of the enthusiasts who defend the version that ‘Oumuamua equipped some alien civilization, even wrote a book based on in their arguments:  “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth”.

And now 2011 AG5. The fact that the asteroid is interstellar cannot be asserted – it revolves around the Sun, making one revolution in 621 days. But it is not a fact that the object is local. Where and when it started, how long ago it arrived is unknown – it was discovered only in January 2011.


Astronomers estimated the guest’s orbit and were very scared – from the data available at that time, it was concluded that in 2040, during the next approach, it might not pass. The odds of colliding with Earth were 1 in 625 – meaning a cataclysm is very likely.

In 2012, the orbit was checked again and it turned out that the fears were unfounded – a collision was ruled out.

As NASA experts now assure, by 2040 the 2011 AG5 will fly at a distance of 1.1 million kilometers. How to understand the “enlightenment” is not entirely clear – whether the mathematicians were mistaken or whether the object changed its trajectory, deliberately minimizing the risk of a collision.

Loeb’s hypothesis: ‘Oumuamua and 2011 AG5 are alien reconnaissance probes. Probably automatic. 2011 AG5 – already purposely sent to the solar system. 

It arrived and went into orbit around the Sun – to “see” the most attractive planets in terms of the possibility of life.


And the orbit of 2011 AG5 is exactly such that Venus, Earth and Mars, located in the so-called habitable zone, regularly fall into its field of view. We, for example, are looking for just that in distant and nearby stars. So far, however, with the help of telescopes.

NASA isn’t giving up on the idea of ​​testing whether ‘Oumuamua is man-made. Under the existing Lira project, he is to launch a ground probe in pursuit. The object that is now approaching Pluto seems to be really reachable thanks to Jupiter. That is, due to the so-called gravitational maneuver (Jupiter-Obert maneuver).

The mystery of the “second alien probe” – 2011 AG5 – can be solved even faster. After all, it seems that he is not going to leave the solar system yet, and objects regularly appear close to Earth. 

It would be wise to send a mission to the “asteroid”.


An artist’s impression of ‘Oumuamua

‘Oumuamua is the first alien probe discovered by mankind (well, let’s assume so) – not the first sent by an extraterrestrial civilization. Or at least the second. The first was probably what we believe the second to be – the 2011 AG5.

How such a misunderstanding could have come about was recently clarified by Graeme Smith, a professor in the Department of Astronomy and Astrophysics at the University of California. He presented his arguments in the International Journal of Astrobiology in the article 

“On the first probe to transit between two interstellar civilizations”  .


If a spacefaring civilization embarks on a program to send probes to interstellar destinations, the first probe to reach that destination will likely not be one of the first probes, but one of much more advanced capability.

This conclusion is based on a scenario in which an extraterrestrial civilization (ETC) embarks on an interstellar program during which it launches increasingly sophisticated probes whose departure velocity increases as a function of time over the course of the program.

Two back-of-the-envelope models are considered: one in which the launch velocity of an outgoing vehicle increases linearly with launch time and a second in which the increase is exponential with launch date.

In this theory, consideration is directed to a hypothetical probe arriving in the Solar System from a non-terrestrial civilization. Within the above scenarios, a first encounter probe will be one that was launched well after the initiation of an interstellar program by an ETC.


Apparently, 2011 AG5 – the second probe discovered by us – arrived first and started systematic searches of the solar system. We only noticed this after Oumuamua, which took off before, but was less perfect and rushed past.

Perhaps there is some cunning third probe hidden somewhere. Or the probes that overtook the two identified and reached Earth in ancient times. The professor does not exclude that the UFOs that accompany people throughout history are somehow connected with them.

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