Circular No. 4829 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505 MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN V745 SCORPII H. Kosai, Japanese National Astronomical Observatory, reports that M. Honda, Kurashiki, Japan, found no image of this object on Tri-X film exposed July 29.549 UT, the magnitude limit being about 12.0. DH AQUILAE This U-Gem-type variable has brightened, as indicated by the following visual magnitude estimates: Aug. 3.52 UT, [13.6 (M. Koshiro, Suwa, Japan); 4.54, 12.7 (Koshiro); 4.54, 12.7 (T. Kato, Kyoto, Japan). R CORONAE BOREALIS Visual magnitude estimates (cf. IAUC 4743): Feb. 29.70 UT, 6.8 (P. Williams, Heathcote, N.S.W.); Mar. 14.96, 7.0 (A. Boattini, Florence, Italy); 22.0, 6.3 (A. Mizser, Budapest, Hungary); June 11.03, 6.1 (A. Pereira, Cabo da Roca, Portugal); July 2.99, 6.1 (J. D. Shanklin, Cambridge, England); 13.00, 6.0 (Pereira); 27.1, 6.2 (J. Sanchez, Tenerife, Canary Islands); Aug. 1.05, 6.3 (M. Kidger, Tenerife, Canary Islands); 3.87, 6.4 (Pereira); 4.92, 6.5 (Shanklin); 5.95, 6.7 (Sanchez); 6.89, 6.4 (P. Schmeer, Bischmisheim, W. Germany); 7.9, 6.8 (Kidger). Z CAMELOPARDALIS Visual magnitude estimates by Schmeer (cf. IAUC 4768): May 4.97 UT, 11.2; 15.01, 12.8; 26.96, 10.8; June 1.98, 12.3; 15.93, 10.9; 20.95, 12.1; July 5.93, 11.0; 16.93, 11.6; 28.94, 11.6; Aug. 1.95, 11.6; 2.91, 11.7. SV SAGITTAE Visual magnitude estimates (cf. IAUC 4777): May 21.97 UT, 11.9 (S. Korth, Duesseldorf, W. Germany); June 3.1, 11.6 (J. E. Bortle, Stormville, NY); 9.1, 11.9 (Bortle); Aug. 2.93, 12.9 (Schmeer); 5.99, 13.0 (Korth). PERIODIC COMET PONS-WINNECKE (1989g) Total visual magnitude estimates: May 7.28 UT, 16.0: (D. Levy, Catalina Mountains, AZ, 1.54-m reflector); July 30.22, 14.0: (C. S. Morris, Lockwood Valley, CA, 0.51-m reflector); Aug. 6.20, 13.5 (Morris). 1989 August 8 (4829) Daniel W. E. Green
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