It's a bit of a misconception to say Betelgeuse has a *high* apparent magnitude. Apparent magnitude is a measure of how bright a star *appears* from Earth. The lower the number, the brighter the star appears.

Here's the thing about Betelgeuse:

* It's a supergiant: Supergiants are incredibly large, meaning they have a vast surface area radiating light.

* It's relatively close: While Betelgeuse is far away compared to our Sun, it's relatively close compared to other supergiants.

While Betelgeuse is cool compared to hotter stars like Sirius, its sheer size and proximity make it appear relatively bright from Earth, even though its absolute magnitude (which measures its intrinsic brightness) is lower.

In summary:

* Apparent magnitude: Relatively low, indicating it appears bright from Earth.

* Absolute magnitude: Lower than its apparent magnitude, indicating it is actually not that intrinsically bright, but its size and distance make it appear bright from Earth.

It's important to distinguish between apparent magnitude (how bright a star appears from Earth) and absolute magnitude (the star's true brightness).