ASASSN-18aan: 2nd rebrightening! Itoh-san, Tonny Vanmunster, Osaka kyoiku U., Sergey Shugarov and Drahomir Chochol have reported further observations. ASASSN-18aan showed the 2nd rebrightening (CV~16 mag) on Dec. 31. Further time-series observations are encouraged. Happy New Year!