Circular No. 4290 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 1986 WA J. Gibson provides the following precise positions, obtained by him with the 1.5-m reflector and CCD at Palomar: 1986 UT R.A. (1950) Decl. Dec. 21.26944 1 24 06.10 + 5 08 13.3 21.27453 1 24 06.70 + 5 08 10.9 Orbital elements from 11 observations Nov. 30-Dec. 21: T = 1986 Sept. 19.138 ET W = 49.362 e = 0.70103 O = 235.162 1950.0 a = 1.50365 AU i = 29.296 n = 0.534542 q = 0.44955 AU P = 1.84 years 1986/87 ET R.A. (1950) Decl. Delta r V Dec. 16 1 12.80 + 5 51.5 0.719 1.450 17.4 26 1 33.25 + 4 44.2 Jan. 5 1 50.65 + 4 25.0 1.103 1.641 18.6 15 2 06.60 + 4 33.8 25 2 21.83 + 4 59.3 1.502 1.808 19.4 Feb. 4 2 36.77 + 5 34.7 14 2 51.62 + 6 15.4 1.899 1.955 20.0 NOVA IN SMALL MAGELLANIC CLOUD R. H. McNaught, Siding Spring Observatory, informs us that the positional data concerning the nova and the nearby star were reversed on IAUC 4283. The nova is located at R.A. = 0h34m51s.20, Decl. = -72 21'11".8 (equinox 1950.0). It was at mag about 16 on Dec. 15 and 20. Searches by McNaught and A. Good of U.K. Schmidt plates taken on Oct. 1.6 UT and earlier show no star in the position of the nova brighter than mag 21.5. The name of the codiscoverer should read G. Garrod. NOVA CENTAURI 1986 Further visual magnitude estimates: Dec. 14.06 UT, 5.5 (J. Campos, Durban, R.S.A.); 16.04, 5.8 (Campos); 18.07, 5.8 (Campos); 22.70, 6.3 (R. H. McNaught, Coonabarabran, N.S.W.); 25.75, 6.7 (McNaught); 27.68, 6.7 (McNaught); 29.75, 6.8 (McNaught). 1986 December 30 (4290) Brian G. Marsden
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