Large crosses are 2.5° long, denoting ecliptics and map centre, small crosses denote comet positions each late evening. The bright star at right is Spica. Labels are Vmag from hip_main.dat.
The comet is 2 mag fainter than the map limit. The map is incomplete as regards faint stars, a (reasonable, for its purpose) property of the Catalogue, not very convenient for making charts.