We observed the variable star RXJ1643.7+3402 at the RIT Observatory on Apr 12, 2002, UT. Data are taken from unfiltered 15-second exposures through a 10-inch f/6.3 telescope onto SBIG ST-8 CCD camera. The measurements span a little more than 1 hour, and were taken through thin cirrus. The star varies with an amplitude of up to 0.3 mag, on timescales of 10-30 minutes. You can see a finding chart and read more about the observations at http://spiff.rit.edu/richmond/ritobs/apr11_2002/apr11_2002.html You can download the data directly from http://spiff.rit.edu/richmond/ritobs/apr11_2002/rx_apr12ut.dat It looks like this star will be a good target for small telescopes. Michael Richmond