Its visibility  during morning twilight improved as it receded outward from the Sun; it peaked near zero magnitude, and at one point displayed a tail roughly 30 degrees in length, before falling below naked eye visibility by the end of December.
The object's visibility during early morning hours increased as it moved further from the sun; it reached its most prominent point near zero magnitude, and at one point displayed a tail about 30 degrees long before disappearing from view for the naked eye by the end of December.