Comet Holladay
From Star Trek : Freedom's Wiki
Comet Holladay is a large rogue comet located within the confines of Sector 6309. The comet was under survey by the USS Rosenante in 2414 when they were called away to intervene in the rescue of refugees and hostages on Beta Aquillia IV. The Comet was roughly two days away from that planet at maximum warp. The Comet is named for the scientist, Todd Holladay, who first discovered it and directed the Rosenante to conduct their survey.
Comet Holladay was first seen in the USS Rosenante Mission The Veil of the Sky