How do you actually find salvage panels?

I know that you have to be in an asteroid field, and I’ve got the multiples of 2k thing down, but how do you find out which objects are actually panels and not asteroids? They all show up exactly the same on my HUD, and whenever I watch videos they just say “head to the panel,” and point at what seems like a random unknown object, like they’re all psychic. Is there actually a way to differentiate asteroids from salvage panels without having to fly over to them? Or is it always just a gamble?