We encountered a couple of issue with tracking

- When we tried to track on polaris coordinates (RA: 37.946143deg  Dec: 89.264138  AzOff=0.261  ZdOff=-0.359) the telescope started to move toward the east relatively fast (roughly ~5deg in less than 1 min) while it was supposed to basically stay on place. Some ephemerides evaluation close to the north pole doesn't seems work

- After ~1h 10m of tracking on Arcturus (RA: 213.913315deg  Dec 19.178249deg  AzOff=0.261  ZdOff=-0.359) we lost tracking. Apparently MOS did not crash (like previous time) so mistery remains. We simply re-start the tracking

- We do not fully understand how Az/Zd offset works.... we test the 2 offset Satoshi got with polaris....at the beginning the star was in the bottom left side of the WT....I added 1deg in azimuth and the star move to the center (so both in Az and zenith)...I go back to original values and the star stay in the same position...