After the rapid fading stopped, the object is now gradually fading. The V-J color index is ~1.2, close to that observed in GW Lib just after its superoutburst. J2138+26 is now very red.
Data policy: Please contact Dr. Makoto Uemura (uemuram_at_hiroshima-u.ac.jp)
if you want to use the data shown in the blog for your research.