Image Credit: J. A. Peñas/SINC / NAIC-Arecibo / NSF

Here Are 6 of the Weirdest Asteroids Ever Found

Here are some of the strangest asteroids we've encountered so far.


Exploring the solar system is a massive feat for humankind.  But we are good at it.  In fact, we seem to be better equipped and willing to explore what lies beyond Earth’s frontiers than exploring our planet or its oceans. Today, we have better maps of Mars than we have of the ocean floor.

As we continue exploring the solar system, we encounter strange things. The more we learn about the solar system, the more we understand that our cosmic neighborhood is full of strange things. In this article, we look at some of the strangest Asteroids that have been found to date.

4 Vesta, the largest Asteroidn

Vesta is a colorful world; craters of a variety of ages make splashes of lighter and darker brown against its surface. Image Credit: Wikimedia Commons / Public Domain.
Vesta is a colorful world; craters of various ages make splashes of lighter and darker brown against its surface. Image Credit: Wikimedia Commons / Public Domain.

4 Vesta is huge. It is considered the largest asteroid discovered in the solar system and was first identified on March 29, 1807, by Heinrich Wilhelm Olbers. Vesta measures 578 km by 458 km. The supermassive asteroid has a magnitude of +5.4 to +8.5. With a clear sky and some luck, Vesta can be easily observed with binoculars. 4 Vesta is so massive that it contributes an estimated 9% of the asteroid belt mass. Until a few years, the largest asteroid was considered Ceres. However, this cosmic body was reclassified as a dwarf planet, given its size.

216 Kleopatra

216 Kleopatra is one of the strangest-looking asteroids in our solar system. Shaped like a bong, the asteroid orbits in the central region of our solar system’s asteroid belt and has a diameter of around 138 kilometers. 216 Kleopatra could be a contact binary. In 2008, scientists discovered two smaller moons around the asteroid, which were named Alexhelios and Cleoselene. The odd shape and the existence of its two moons are thought to have resulted from an oblique impact that occurred around 100 million years ago.


624 Hektor

This massive space rock is the largest  Jupiter trojan in the solar system. It has an extremely elongated shape, equivalent in volume to a sphere of approximately 225 to 250 kilometers in diameter. This asteroid is considered one of the most elongated bodies of its size ever discovered in the solar system, at approximately 403 km in its longest dimension. Just like 216 Kleopatra, this asteroid has a  12-km-diameter moon named Skamandrios.

24 Themis

This is a three-dimensional model of 24 Themis created based on light-curve inversions. Image Credit: Wikimedia Commons / CC-BY 4.0.
This is a three-dimensional model of 24 Themis created based on light-curve inversions. Image Credit: Wikimedia Commons / CC-BY 4.0.

Discovered on the 5th of April, 1853, by Annibale de Gasparis of Naples, 24 Themis is one of the largest asteroids in the asteroid belt. It stands out as the first asteroid to have ice on its surface. Observations in 2009 confirmed the existence of massive amounts of ice,  as well as organic molecules. Observations revealed that the surface of the asteroid is completely covered in ice. The ice may be replenished by an unknown reservoir beneath the surface. Because 24 Themis is located relatively close to the sun (~3.2 AU), the widespread ice on the asteroid’s surface is somewhat puzzling.


An artist's impression of the huge cigar-shaped object called 'Oumuamua.
An artist’s impression of the huge cigar-shaped object is called ‘Oumuamua.

Oumuamua is surely the strangest asteroid humankind has ever spotted. Not only is this asteroid from another solar system, but it is also the very first interstellar visitor spotted by mankind. What makes this asteroid even more puzzling is that for the last 12 months, there has been great speculation about the asteroid’s true origin. In fact, the head of Astronomy at Harvard has even theorized that ‘Oumuamua may be, not an asteroid, but an alien spacecraft sent to our solar system by an advanced alien species.

2015 TB145


This is perhaps the strangest-looking asteroid of them all, and it has been dubbed the ‘Skull-Shaped Asteroid.’ The asteroid often passes relatively close to Earth at approximately 650 meters (2,000 feet) in diameter. The asteroid was first observed on 10 October 2015 by Pan-STARRS. Astronomers argue that given its high orbital inclination and eccentricity, 2015 TB145 may actually be an extinct comet that has shed its volatiles after numerous passes around the Sun.


Phaeton, an extra weird one

An extra asteroid we could probably include in this list is asteroid Phaeton. According to NASA, asteroid 3200 Phaethon – a peculiar object in space – is even more unusual than previously believed. Initially thought to have a dust tail like a comet, a recent study published in The Planetary Science Journal reveals that the tail is made of sodium gas instead.

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Written by Ivan Petricevic

I've been writing passionately about ancient civilizations, history, alien life, and various other subjects for more than eight years. You may have seen me appear on Discovery Channel's What On Earth series, History Channel's Ancient Aliens, and Gaia's Ancient Civilizations among others.

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