COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 700 Konkoly Observatory Budapest 1972 July 24 SUPERNOVA IN NGC 5253 The following observations of the supernova in NGC 5253 have been made with the UBV photometer on the 18-inch reflector. Linear transformations have been used to reduce the instrumental values to the standard system. J.D.2441455.33 V=8.68: B-V=+0.16 U-B=-0.10 457.22 8.80 +0.20 -0.06 458.21 8.86 +0.22 -0.04 459.41 8.92 +0.26 0.00 460.24 8.96 +0.28 +0.02 471.27 9.46 +0.90 +0.24 475.24 9.68 +1.03 +0.23 1972 July 11 A.W.J. COUSINS South African Astronomical Observatory OBSERVATORY, Cape Province