During the "comet walk," the drilling team experienced several setbacks, including a broken drill bit due to a layer of magnesite, a rotational axis shift resulting in the dawn approaching sooner than expected causing the temperature to increase by several hundred degrees, and the shuttlepod falling into a chasm due to melting ice. Enterprise attempted to use the grappler and pull the shuttlepod to safety. However, a secure hold could not be obtained. The drilling team was eventually rescued by the Vulcan ship Ti'Mur. (ENT: "Breaking the Ice")
In the writers' second draft of "Breaking the Ice", this comet was instead named "Comet Archer" and was said to have a diameter of forty-eight point six kilometers. It was described as having been traveling through space for the past ten billion years and be scheduled to orbit within fifty kilometers of its sun in twenty-seven days since its discovery by Enterprise. Also, it was theorized that, during the past ten billion years, the comet had orbited around its sun only a few times.
In the first draft script of "Fortunate Son", Archer mentioned that the scans of the comet didn't do justice to actually seeing the comet in person, and Admiral Forrest wrily answered he had been told the comet would be visible from Earth in approximately ten thousand years.