Supernova 2000cj in NGC 6753

Robert Evans, Hazelbrook, N.S.W., reports the visual discovery of an apparent supernova (mag about 14.8) on May 14.7 UT with a 0.31-m reflector. A CCD image taken in bright moonlight by T. Dobosz, Bankstown, N.S.W., with a 0.28-m Schmidt-Cassegrain telescope on May 15.6 shows the new star superimposed upon a spiral arm of the galaxy, and a measurement of this image by G. L. White, Nepean Centre for Astronomy, Kingswood, N.S.W., yields the following position for SN 2000cj: R.A. = 19h11m27s.49, Decl. = -57o03'14".1 (equinox 2000.0), which is about 35" east and 19" south of the nucleus of NGC 6753. Position end figures for SN 2000cj (mag 14.7) measured by R. H. McNaught at Siding Spring (from a CCD image obtained by R. Langersek, Macgregor, Qld., with a 0.25-m Schmidt-Cassegrain telescope on May 15.62) are 27s.68, 19".4 (reduction using ten USNO-A2.0 stars, rms 0".4), with the offset being 33" east and 22" south of the galaxy center. McNaught confirms that nothing appears at this position on the ESO B, ESO R, and SERC J surveys. N. Suntzeff, Cerro Tololo Interamerican Observatory (CTIO), reports that preliminary photometry from observations obtained by L. Strolger on May 17.1 with the CTIO 0.9-m telescope yields V = 14.56, B-V = 0.00. Additional visual magnitude estimates: May 14.79, 14.8: (P. Marples, Loganholme, Qld.); 15.7, 14.7 (Evans).