Juno 98 was the designation of an asteroid belt in Deep Space, well known to ancient astros as being the dwelling place of the Vampire GELFs.
When Lister fell asleep at the controls of Starbug after a giant Sunday roast, the gang ended up 5,000 clicks of course. Lister suggested a short-cut back to Red Dwarf through the asteroid belt Juno 98, but Kryten and Rimmer noted from ancient astro tales that this belt was the dwelling place of the Nakhi Ninkas, or Vampire GELFs. The Cat was terrified, since he was still a virgin - a favourite of the GELFs - although he was too proud to admit it. After much mocking from Rimmer, Lister told Cat he would go the long way around Juno 98. (Can of Worms, Series XI)