Circular No. 3873 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 617-864-5758 SUPERNOVAE P. M. Williams, U.K. Infrared Telescope Unit, Hilo, telexes that J. H. Hough and W. B. Sparks have discovered a supernova at R.A. = 3h14m57s0, Decl. = +41deg40'33" (equinox 1950.0), within 2"-3" of the nucleus of NGC 1265. On Oct. 1.6 UT the object was of mv ~ 13. E. P. Aksenov, Sternberg Astronomical Institute, cables a communication from Yu. V. Terebizh, Sternberg Crimean Station, that Nataliya Metlova has discovered a possible supernova 7" east and 5" south of the galaxy MCG 6-36-55 (R.A. = 16h35m1, Decl. = +36deg31', equinox 1950.0). On Sept. 10.76 UT the object was of mpg ~ 16. COMET IRAS (1983o) The following precise positions have been measured by P. M. Kilmartin from exposures at Mt. John Observatory by A. C. Gilmore: 1983 UT R.A. (1950.0) Decl. m1 Sept.16.34709 12 59 29.70 -45 40 25.5 16 16.36943 12 59 31.72 -45 40 02.0 The following improved parabolic elements have been determined by the undersigned from observations July 27-Sept. 16: T = 1983 Nov. 28.1543 ET Peri. = 334.0661 Node = 200.5942 1950.0 q = 2.253980 AU Incl. = 120.7256 PERIODIC COMET HALLEY (1982i) M. J. S. Belton, P. A. Wehinger and S. Wyckoff report the following accurate positions, obtained with an RCA CCD at the prime focus of the Mayall telescope, Kitt Peak National Observatory, with a scale of 0"58/pixel. Internal accuracy was substantially better than +/- 1" , and the seeing (FWHM) was 1"7. Preliminary photometric results, calibrated by standards in NGC 2419, gave V = 24.5 +/- 0.3, B = 24.9 +/- 0.4. Photometry for the 1982 Oct. 20.38542 observation (cf. IAUC 3742) gave R = 23.7 +/- 0.3. 1983 UT R.A. (1950.0) Decl. Feb. 13.21068 6 29 44.53 + 9 55 52.1 13.27356 6 29 43.20 + 9 55 57.5 1983 October 4 (3873) Brian G. Marsden
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