Some Details In The Centaurian System

Poul Anderson, Harvest Of Stars.

Living Kyra's memorabilia include:

"...a glittery rock from the single planet that B had kept..." (59, p. 494)

Thus, Kyra, now based on Demeter in the system of Alpha Centauri A, has visited at least:

Perun in the system of Alpha Centauri A;
the single remaining planet in the system of Alpha Centauri B;
Phaeton, which A has captured from B.

Before Kyra visited Perun, Demetrians had not known what the Lunarians' new social structure was. She gathers that Rinndalir is still an overlord but does not know whether he rules just Perun or all Centaurian Lunarians. We learn that he remains a lord Selenarch and that rivals of his own rank include "'...Asille of Arcene...'" (58, pp. 489, 491) There is more information about Lunarian power politics in 60.