The meridional distance of the sun from the zenith of Alexandria he estimated to be 7 deg.
"Beacon Lights of History, Volume III" by John Lord
This could be interpreted by assuming that the hot spots are not in antipodal position but have a meridional distance of ≈ 160◦ (Schwope et al. 2005, Haberl et al. 2006, Haberl 2006).
Turning Points in the Evolution of Isolated Neutron Stars' Magnetic Fields