May. It became smaller and fainter, about 12 mag, in March by CCD, but visual observers reported it as bright as the ephemeris. It is appearing at dawn in the Southern Hemisphere. But still not observable in the Northern Hemisphere, it will appear again in early May as 10 mag. It will appear again in September as 13 mag. Only southern people can observe it.
Norhtern people can never see it again.
It locates high in the Southern Hemisphere. For the Northern observsers, this early April is the last chance. Then it has gone to the south. It has bursted out on Mar. 16 and raeched to 12.6 mag visually. Only southern people can observe it.