Dark comet

What is a Dark Comet?

Dark comets are a special group of space rocks called asteroids that sometimes act a bit like comets. Unlike typical comets, which grow bright tails and fuzzy clouds when they get close to the Sun, dark comets look just like regular asteroids.

How Do Dark Comets Behave?

Scientists noticed something special about dark comets: they move in ways that can't be explained by gravity alone, causing them to change their paths in space.

Types of Dark Comets

These unusual objects were first recognized as their own group in 2023. Dark comets come in two main types. The outer dark comets are usually bigger and have orbits far from the Sun, while the inner dark comets are smaller and stay closer to the Sun.

Why Study Dark Comets?

Studying these objects helps us learn more about the many different kinds of objects that travel through our solar system and how they move along their paths in orbital path.

Discovery

The first object that acted like a "dark comet" was ‘Oumuamua, found in 2017. It moved like a comet but did not have the bright cloud or tail that comets usually have.

Scientists later found more objects in the asteroid belt that moved like comets. By 2024, they found 14 of these objects. Some were bigger and reflected more light, while others were smaller and had more rounded paths around the sun.

Exploration

Japan's Hayabusa2 mission will visit the asteroid 1998 KY26. This asteroid was later found to be a dark comet. The meeting will happen in July 2031. It will help scientists learn more about dark comets.