Holiday in Aisen – Aisen Travel for When the cometary baby was born on October , BC, the entire tail and most of the coma would have risen above the eastern horizon in a completely dark sky when the Sun was more than degrees below the horizon and hence would have been easily seen. The very lowest segment of the coma would have risen when astronomical twilight was just beginning, with the whole coma and tail visible when the Sun was degrees below the horizon. Since the comet was very bright, it would have been clearly visible to the Magi in Babylon at that point. Incidentally, from October to the whole coma appeared above the horizon when the Sun was more than degrees below the horizon. If n and the comet was first spotted in the latter half of BC. Marcus, Background and Model, ig Earth was in a great location from which to see any sunward spike, consisting of the concentration of larger particles close to the cometary head, particles too large for the Sun to force behind the coma. Indeed, since the Christ Comet was narrowly inclined to the ecliptic plane, it, like Comet Lulin, may have had a continual sunward spike. Holiday in Aisen – Aisen Travel 2016.