Circular No. 5413 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 COMET ZANOTTA-BREWINGTON (1991g1) S. Nakano, Sumoto, Japan, communicates the following precise positions by T. Kobayashi, Oizumi (0.16-m reflector + CCD): 1991 UT R.A. (2000) Decl. Dec. 26.37853 20 53 52.22 +18 06 43.6 26.41078 20 53 58.97 +18 05 59.4 COMET McNAUGHT-RUSSELL (1991v) Ephemeris continuation from the orbital elements on MPC 18995: 1991/92 R. A. (2000) Decl. Delta r Elong. Phase m1 Dec. 20 20 09.48 -58 10.9 4.105 3.447 42.7 11.2 16.4 30 20 27.13 -58 43.0 4.097 3.413 40.8 10.8 16.4 Jan. 9 20 46.95 -59 17.5 4.071 3.381 40.3 10.8 16.3 19 21 08.99 -59 53.7 4.029 3.351 41.2 11.1 16.3 29 21 33.38 -60 30.7 3.972 3.324 43.3 11.7 16.2 Feb. 8 22 00.30 -61 07.2 3.902 3.299 46.3 12.5 16.1 18 22 29.90 -61 41.5 3.824 3.277 50.0 13.4 16.1 28 23 02.32 -62 10.9 3.739 3.257 54.0 14.2 16.0 Mar. 9 23 37.63 -62 32.2 3.652 3.240 58.2 15.1 15.9 19 0 15.62 -62 41.3 3.566 3.226 62.3 15.9 15.8 PERIODIC COMET LEVY (1991q) Ephemeris continuation from the orbital elements on MPC 19258: 1991/92 R. A. (2000) Decl. Delta r Elong. Phase m1 Dec. 20 9 31.28 +29 45.2 1.820 2.571 130.6 16.9 13.4 30 9 20.39 +30 12.6 1.834 2.682 142.5 12.9 13.6 Jan. 9 9 07.19 +30 34.9 1.872 2.791 154.3 8.8 13.8 19 8 52.93 +30 45.8 1.940 2.900 164.5 5.2 14.1 29 8 39.03 +30 42.2 2.038 3.007 167.4 4.1 14.3 Feb. 8 8 26.68 +30 24.2 2.168 3.113 159.9 6.2 14.6 18 8 16.77 +29 54.4 2.327 3.217 149.4 9.0 14.9 28 8 09.66 +29 16.5 2.512 3.321 138.7 11.4 15.2 Mar. 9 8 05.35 +28 33.7 2.719 3.423 128.2 13.2 15.5 19 8 03.66 +27 48.4 2.942 3.524 118.3 14.4 15.8 1991 December 26 Brian G. Marsden