How visible is Sirius B from Sirius A?

Hi. I'm an SF writer, and many years ago I asked a pretty basic question here in sci.astro and got some extremely helpful answers, so I thought I'd have another go!

My story's set on a planet fairly closely orbiting Sirius A. My question is: how well (on average) could the inhabitants see Sirius B? Would it be too far away to seen without a telescope, or would it shine brightly enough to be seen by the naked eye?

Many thanks for any help anyone can give me!

Cheers,
- Kate