Sounds to me like those are the dregs of the Ihatei. One small ACS of Aslan. Maybe 30 in total. Unsupported by Clan or Aslan corp except for the ship which likely does not belong to the Ihatei, but to their clans or corps affiliated with their clans. Easily put down by small 1,000-ton or less Imperial or Colonial patrol craft. Nothing like you read about in PoD on Kteiroa, especially the millions of those who lost their planet in the recent clan war and will be searching for new lands with the full forces of their remaining military vessels. Take a look in PoD, what happens if the PCs fail in their quest on Kteiroa.
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On that same page 10 in the Reft book that the Subsector Fleet only has 2 main ships, 1 light cruiser and 1 obsolete strike carrier, both cruiser-class vessels. That, plus some patrol craft and it is easy to see how millions of Ihatei could easily overrun this subsector during the Rebellion Era.