In "The Explored Galaxy" star chart, Holberg 917G was located between the Tholian Assembly and Romulus. Both were identified in DS9: "Call to Arms" as being located in the Alpha Quadrant. Based on the chart, there were two systems that shared the name Omega. The first system contained the planet Omega IV and the second, which was closer to Sol, contained the planet Holberg 917G. According to Star Trek Maps (page 28) though, both planets were located in the same Omega system. Holberg 917G being the seventh planet and Omega IV the fourth.