More information is at:
http://www.blackskies.org/nsp16.htm
The SN was first seen from Lo Yang (112 26E, 34 40N) on 7/12/185.
Precession means it was higher above the horizon then.
Andrew James writes.
Reports and observations in the historical record come from a provincial city known as Lo Yang. (Latitude +34.7dN) Invisible from this location today, precession places this "new star" at declination -51d36' S (185AD) whose southerly culmination is some 3.6d above the horizon.
It was seen for 8 or maybe 20 months. http://arxiv.org/abs/astro-ph/0301603