Largest Black Hole Ever Discovered
The black hole named OJ 287 is the largest black hole discovered so far, with a mass of 18 billion solar masses.
If this black hole were located near our Sun, its event horizon would be 104 billion km in all directions. This means its total diameter is 211.7 billion km. To understand the distance, let's consider Pluto's orbital distance. Pluto is approximately 3.6 billion km from the Sun.

The black hole named OJ 287 is the largest black hole discovered so far, with a mass of 18 billion solar masses.