2010CBET.2241....1D

G. Duszanowicz, Akersberga, Sweden, reports the discovery of an apparent supernova (mag 17.2) on unfiltered CCD images obtained on Apr. 14.03 (limiting mag 19.0) and 14.82 UT (limiting mag 18.6) with a 0.32-m f/3.1 reflector (+ Starlight Xpress MX716 CCD camera). The new object is located at R.A. = 16:46:55.41, Decl. = +34:09:35.4 (equinox 2000.0), which is 17" west and 15" north of the center of UGC 10547. Nothing is visible at this position on an image taken by himself on Apr. 1.99 (limiting mag 18.3) or on a Palomar Sky Survey image (via the Digitized Sky Survey) taken on 1954 May 27 (limiting red mag 20-21).