Circular No. 4032 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444 COMET LEVY-RUDENKO (1984t) Elliptical orbital elements from MPC 9425: Epoch = 1984 Dec. 6.0 ET T = 1984 Dec. 14.2557 ET Peri. = 82.7391 e = 0.999378 Node = 330.4664 1950.0 q = 0.917984 AU Incl. = 65.7122 1985 ET R.A. (1950.0) Decl. p r m1 Jan. 25 17 30.37 +58 20.2 0.719 1.174 8.5 27 17 19.79 +60 50.8 29 17 06.45 +63 26.6 0.685 1.217 8.5 31 16 49.30 +66 05.4 Feb. 2 16 26.77 +68 43.0 0.657 1.261 8.6 4 15 56.7 +71 12.5 6 15 16.6 +73 22.7 0.638 1.307 8.7 8 14 24.6 +74 57.6 10 13 22.6 +75 38.4 0.630 1.354 8.8 12 12 18.3 +75 12.9 14 11 21.3 +73 44.1 0.633 1.402 9.0 16 10 36.1 +71 27.4 18 10 02.11 +68 40.5 0.650 1.450 9.2 20 9 36.92 +65 37.1 22 9 18.11 +62 27.0 0.680 1.500 9.4 24 9 03.86 +59 16.5 26 8 52.89 +56 09.9 0.723 1.549 9.7 28 8 44.35 +53 10.0 Total visual magnitude estimates: Jan. 3.55 UT, 7.8 (C. S. Morris, near Mt. Wilson, CA, 20 x 80 binoculars); 8.98, 8.0 (J. E. Bortle, 20 x 80 binoculars, Stormville, NY); 9.97, 8.0 (Bortle); 18.53, 7.8 (Morris); 20.52, 8.1 (Morris). NOTICE TO TELEGRAM SUBSCRIBERS It has been pointed out that there is a discrepancy between the specifications for category 2 and 3 telegrams and what the Central Bureau does in practice. Accordingly, subscribers are advised that discovery announcements of comets fainter than mag 16 go only to subscribers to category 3 messages, but announcements of comets in the range mag 13-16 will generally be of category 2. The Bureau reserves the right to exercise discretion on this. 1985 January 31 (4032) Brian G. Marsden
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