This is one of several hundred star images taken by the MOC team in June and July of 1993 to calibrate the MOC's focus control heaters. It shows Alpha Centauri A and B, and is part of a larger frame, 2048 pixels wide and 1024 lines high, acquired at 23:59:38 UT on 18 June 1993. The MOC DCT compressor was used to compress this image by a factor of about 100 times.