Thanks for the link, I indeed miscalculated this earlier. Indeed it looks like we have around 5-7 days. Let me explain with the right calculations:
Usually the last TLE we get from space-track.org before re-entry has around 16.25 -16.45 revolutions/day. For example this is the last TLE from Binar 2 from the same deployment at ~16.3 revs/day:
1 60957U 98067WX 24310.06998193 .09654898 12176-4 19638-2 0 9991
2 60957 51.6018 328.1298 0004329 55.5404 304.6027 **16.30458602** 12600
Below is how fast Sakura revs/day change:
1 60954U 98067WU **24322.55240802** .00619248 16240-3 18810-2 0 9999
2 60954 51.6222 266.8023 0009013 152.0393 208.1099 **15.91405296** 12551
1 60954U 98067WU **24323.05467068** .00628473 16848-3 18494-2 0 9992
2 60954 51.6215 264.1538 0009216 155.7424 204.4018 **15.92013231** 12639
1 60954U 98067WU **24324.12129961** .00708078 21809-3 19332-2 0 9993
2 60954 51.6217 258.5229 0009432 162.0403 198.0939 **15.93437885** 12808
1 60954U 98067WU **24325.24954963** .00766984 26317-3 19062-2 0 9994
2 60954 51.6200 252.5517 0009999 168.4681 191.6557 **15.95188264** 12980
1 60954U 98067WU **24325.93838509** .00844473 32754-3 19670-2 0 9994
2 60954 51.6187 248.8973 0010150 173.0652 187.0499 **15.96385162** 13093
1 60954U 98067WU **24327.18945683** .01057773 55375-3 21654-2 0 9994
2 60954 51.6187 242.2456 0010210 180.2959 179.8046 **15.98748573** 13294
1 60954U 98067WU **24328.00159946** .01206815 76881-3 22365-2 0 9993
2 60954 51.6181 237.9127 0010577 185.5812 174.5082 **16.00532876** 13424
You can see that for each day the revs/day are increased by ~0.015. This would mean that reaching 16.3 from the current 16.0 it would take 20 days, however the rate of change of revs/day is also increasing as we reach lower orbits, especially under 16 revs/day. So, if we take this into account then 20 days can become 5-7 days. Another significant parameter is also the space weather that can affect the re-entry time too.
I hope it start again transmitting in order to be able to track its re-entry properly. Let’s see.