De acordo com a Memória Alfa , tem havido bastante debate sobre isso. Mas parece que sim, está no quadrante Delta.
While the Sikarians explained that they could reach all planets in their quadrant, it was not explicitly said, and nor does it follow, that Alastria too was in the Delta Quadrant. However, according to Startrek.com and the Star Trek Encyclopedia (3rd ed., p. 5), this planet was located in this quadrant.
Isto de Startrek.com :
A Delta Quadrant planet with a binary star about 40,000 light-years from Sikaris, accessed via the spatial trajector.
Portanto, supondo que a Enciclopédia Jornada nas Estrelas seja a fonte mais precisa de informações, então você pode dizer que sim:)