for May 1997, with the apogee 40x120 from Pretoria Star UT Magn cvs KX TrA 17.0 12.1 Sakur obj 17.0 11.2 V1830 Sgr 17.006 12.0 V1830 Sgr 17.108 12.2 AR Pav 17.0 11.6 V3885 Sgr 17.1 10.3 RR Tel 17.1 10.9 RZ Gru 17.1 12.2 rcbs RZ Nor 17.0 11.7 V1860 Sgr 17.0 12.1 others AI Sco 05.8 10.5 AI Sco 11.8 11.3 AI Sco 14.9 11.3 AI Sco 16.9 10.9 S Ind 17.1 8.5 My consecutive estimates of V1830 could be linked to superhumps but I rather expect the 0.2 magnitude change over the two hour period to be caused by the position angle effect. V1830 Sgr has moved through zenith during that period and the apogee is always used aiming at the target to the right hand site of zenith. Regards, Berto Monard / MLF