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Circular No. 6986 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only) COMET 1998 P1 D. A. J. Seargent, The Entrance, New South Wales, Australia, reports the visual discovery by Peter Williams of Heathcote (near Sydney) of a new comet. Available observations: 1998 UT R.A. (2000) Decl. m1 Observer Aug. 10.486 15 10.8 -64 59 9.5 Williams 11.37962 15 02 11.23 -63 54 16.7 Garradd 11.38046 15 02 10.74 -63 54 13.4 " 11.38200 15 02 09.89 -63 54 06.7 " 11.38350 15 02 08.99 -63 53 59.3 " 11.385 15 02.3 -63 54 9.5 Williams 11.38775 15 02 06.78 -63 53 42.1 Garradd 11.46470 15 01 25.34 -63 48 12.9 " 11.46569 15 01 24.81 -63 48 08.5 " 11.47476 15 01 19.94 -63 47 29.6 " 11.48030 15 01 17.02 -63 47 05.7 " 11.48244 15 01 15.86 -63 46 56.5 " P. Williams (Heathcote). 0.30-m f/6 reflector (72x). Comet diffuse with a stellar central condensation of mag 13. G. J. Garradd (Loomberah). 0.45-m f/5.4 reflector + CCD. 60-sec exposure shows 8' coma and 6' tail in p.a. 103 deg; m_2 = 13.2-14.4. Additional visual m_1 estimates: Aug. 10.52 UT, 9.5 (Seargent, 25x100 binoculars; poor conditions, moonlight); 11.38, 9.5 (Williams, 20x80 binoculars; coma diameter 4'); 11.44, 9.0: (R. H. McNaught, Siding Spring Observatory, 20x120 binoculars). SUPERNOVA 1998dj in NGC 788 M. Modjaz, T. Shefler, E. Halderson, J. Y. King, W. D. Li, R. R. Treffers, and A. V. Filippenko, University of California at Berkeley, report their discovery of an apparent supernova during the course of the Lick Observatory Supernova Search (cf. IAUC 6627) with the 0.8-m Katzman Automatic Imaging Telescope (KAIT). SN 1998dj was found and confirmed on unfiltered CCD images obtained on Aug. 8.5 (mag about 16.1) and 9.5 UT (mag about 16.0). The object is located at R.A. = 2h01m06s.92, Decl. = -6 49'04".8 (equinox 2000.0), which is about 7".1 east and 8".6 south of the nucleus of NGC 788. A KAIT image (limiting mag about 18.0) obtained on Jan. 25.2 does not show a star at the position of the new object. (C) Copyright 1998 CBAT 1998 August 11 (6986) Daniel W. E. Green
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