Circular No. 5033 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 SUPERNOVA 1990M IN NGC 5493 R. Evans, Hazelbrook, N.S.W., reports his discovery on June 15.45 UT of an apparent supernova in NGC 5493 (R.A. = 14h08m.9, Decl. = -4 49', equinox 1950.0), located 15" west and 4" north of the galaxy's center. T. Cragg, Siding Spring Observatory, confirmed the object visually at mag 13.5. PERIODIC COMET WOLF-HARRINGTON (1990e) J. V. Scotti reports his recovery of this comet with the 0.91-m Spacewatch telescope at Kitt Peak, as given below. The June 14.413 image shows a 10" tail in p.a. about 250 deg. The indicated correction to the prediction on MPC 13057 (ephemeris on MPC 16252) is Delta(T) = +0.01 day. 1990 UT R.A. (1950) Decl. m1 June 14.38469 23 04 18.46 +14 56 06.5 14.40553 23 04 19.23 +14 56 19.7 14.41287 23 04 19.45 +14 56 24.6 14.42689 23 04 20.05 +14 56 33.8 19.3 15.44332 23 04 59.59 +15 07 49.2 15.45372 23 04 59.96 +15 07 55.0 V854 CENTAURI Visual magnitude estimates (cf. IAUC 4936): Jan. 3.81 UT, 13.5 (A. Pearce, Scarborough, W.A.); 7.81, 13.9 (Pearce); 26.72, 14.5 (Pearce); Feb. 22.77, 14.2 (Pearce); 24.83, 14.5 (Pearce); May 19.40, 12.5 (P. F. Williams, Heathcote, N.S.W.); 26.43, 12.5 (Williams); 31.51, 11.9 (Williams). COMET AUSTIN (1989c1) Total visual magnitude estimates (cf. IAUC 5030): June 12.15 UT, 8.4 (G. Kronk, Troy, IL, 20x80 binoculars); 13.19, 8.2 (Kronk); 14.58, 8.9 (A. Pearce, Scarborough, W.A., 20x80 binoculars); 15.51, 9.1 (Pearce). PERIODIC COMET SCHWASSMANN-WACHMANN 3 (1989d1) Total visual magnitude estimates (cf. IAUC 5018): May 27.46 UT, 9.7 (J. E. Bortle, Big Bear, CA, 0.20-m reflector); June 1.44, 10.2 (A. Hale, Las Cruces, NM, 0.41-m reflector); 4.47, 10.5 (C. S. Morris, Pine Mtn. Club, CA, 0.26-m reflector). 1990 June 15 (5033) Daniel W. E. Green
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