Mira YY Tau is approaching minimum but has become fainter than I can reliably observe with my 14" OTA and CCD. You can make a very timely contribution by fitting in even a couple of observation points over the next 4-6 weeks.
The VSX ephemeris dates from 1926, giving a period of 192.1 days which seems wrong--I'm seeing a current period about twice that length. You may judge for yourself:
YY Tau: 05:28:38 +15:40:55 (J2000) // V max ~ 11.5 V min ~ 18(??)
Thanks for whatever you can do!
Eric Dose, Albuquerque New Mexico