COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 365 Konkoly Observatory Budapest 1969 July 21 THE VARIABILITY OF HD 128661 HD 128661 = BD +36deg2509 was reported by Jackisch (1968) to be probably an eclipsing variable with an eclipse duration of 4h20m. Photoelectric observations in two wavelength regions were made on three nights with a 16-inch Gregorian f/35 reflector at the Tortugas Station of the New Mexico State University Observatory. An uncooled RCA 1P21 photomultiplier was used in conjunction with a DC amplifier and a Brown recorder. Standard B and V filters were used. The comparison and check stars were BD+36deg2568 and BD+36deg2505 respectively. No variation was noticed between the check and comparison TABLE 1 OBSERVATIONS WITH THE V FILTER J.D.hel Delta m J.D.hel Delta m J.D.hel Delta m J.D.hel Deltam 2440361 .86177 -.150 .71656 -.212 .89819 +.085 .72181 -.151 .86385 -.150 .72593 -.118 .89541 +.102 .75305 -.149 .86559 -.174 .72836 -.122 .90860 +.049 .75583 -.157 .87739 -.181 .73079 -.142 .91069 +.050 .75722 -.148 .87913 -.168 .74121 -.201 .91346 +.054 .76659 -.163 .89996 -.137 .74294 -.199 .92562 +.081 .76698 -.178 .90170 -.160 .74468 -.169 .92805 +.055 .76937 -.149 .90343 -.175 .75475 -.141 .93950 +.057 .77666 -.168 .90552 -.151 .75648 -.140 .94124 +.011 .77840 -.149 .91628 -.159 .75857 -.172 .94263 -.002 .78014 -.129 .91836 -.136 .80930 -.124 .95270 -.072 .79055 -.151 .92010 -.114 .81138 -.143 .95409 -.123 .79298 -.141 2440362 .85860 -.081 2440383 .79402 -.148 .68183 -.233 .85999 -.045 .70614 -.242 .80865 -.118 .68322 -.221 .86138 -.051 .70892 -.134 .81004 -.117 .68496 -.182 .87423 +.044 .71135 -.115 .81177 -.107 .69538 -.223 .87631 +.033 .72281 -.050 .81976 -.144 .69746 -.212 .87805 +.014 .72420 -.061 .82080 -.145 .70371 -.151 .89263 +.109 .73288 -.064 .84858 -.157 .71482 -.136 .73531 -.105 .73739 -.175 TABLE 2 OBSERVATIONS WITH THE B FILTER J.D.hel Delta m J.D.hel Delta m J.D.hel Delta m J.D.hel Delta m 2440361 .86107 -.172 .71482 -.136 .89819 +.085 .72042 -.201 .86281 -.179 .71656 -.212 .89541 +.102 .75236 -.261 .86489 -.182 .72593 -.118 .90860 +.049 .75444 -.242 .87496 -.172 .72836 -.122 .91069 +.050 .76590 -.193 .87670 -.172 .73079 -.142 .91343 +.054 .76729 -.185 .87613 -.191 .74121 -.201 .92562 +.081 .76368 -.196 .89962 -.159 .74294 -.199 .92805 +.055 .77597 -.176 .90066 -.177 .74468 -.169 .93950 +.057 .77770 -.201 .90239 -.181 .75475 -.141 .94124 +.011 .77909 -.191 .90482 -.164 .75648 -.140 .94263 -.002 .79020 -.190 .91524 -.173 .75857 -.172 .95270 -.072 .79194 -.194 .91732 -.178 .80930 -.124 .95409 -.123 .79368 -.199 .91906 -.191 .81138 -.143 2440383 .80726 -.194 2440362 .85860 -.081 .70510 -.251 .80934 -.184 .68183 -.233 .85999 -.045 .70755 -.238 .81108 -.164 .68322 -.221 .86133 -.051 .71031 -.173 .81837 -.177 .68496 -.182 .87423 +.044 .72177 -.159 .82010 -.180 .69538 -.223 .87631 +.033 .72350 -.156 .82149 -.175 .69746 -.212 .87805 +.014 .73184 -.152 .84753 -.209 .70371 -.151 .89263 +.109 .73427 -.156 .73635 -.176 stars. An "eclipse" was observed on May 20-21, 1968 and the epoch of minimum determined by the tracing paper method was found to be t_min = JD (heliocentric) 2440362.9070. This "eclipse" is considerably narrower than that observed by Jackisch being only about three hours long, but the depths are in good agreement. Tables 1 and 2 contain the observations. Delta m is the magnitude of the variable minus that of the comparison corrected for differential extinction. JD is the heliocentric time of the observation. References Jackisch, G., 1968, Comm. 27, IAU Inf. Bull., No. 314 [IBVS 314] ALLEN JOEL HARRIS Department of Earth Sciences and Astronomy New Mexico State University Las Cruces, New Mexico 88001