I posted this on the Rogue Trader Forum, but it was pointed out that for the more space faring Inquisitors it may also be very handy (or for those GM's who want to visist one of the systems in the Calixus Sector Map that aren't fleshed out )
After a long look at the simple system generation in the Rogue Traders GM's Guide I decided to expand it... I hope you find it useful, our GM took it further and uses it to create clusters of stars!