Just as in camera menu, there is WB presets available in RAW processing. Those include daylight, cloudy, shade, flash, fluorescent, etc. And of course Auto and custom settings. When processing my photos I like to use a WB pick-up tool, but what would I pick from a photo of pitch black sky pinholed with bright stars only? I would not be asking, if I had something/anything in the foreground, like a barn or a tree, but there is only stars in the whole photo. I went through those presets, but those either did nothing or made the photo look bad. Then I tried haphazardly some custom settings out of my head, and finally surrendered to use AWB that was already there to begin with.
My question is: Is there a color temperature (zone, if not any exact temp) uniformly found good for star photography, even as a starting point for further adjusting? Or rather: Is adjustments in white balance needed at all when there's only stars showing?