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Circular No. 8248 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304 Phone 617-495-7440/7244/7444 (for emergency use only) COMET P/2003 UD_16 (LONEOS) An apparently asteroidal object with not-unusual motion, found by LONEOS on Oct. 16 (the discovery observation given below, together with other astrometry, appeared on MPS 88336, 90581, and 91035 with the designation 2003 UD_16; initial orbit on MPO 53844), has been found by C. W. Hergenrother to show a circular, condensed 11" coma and no tail on co-added 900-s R-band CCD exposures taken on Nov. 30 with the Mt. Hopkins 1.2-m reflector (astrometry below measured by T. B. Spahr). Additional unpublished LINEAR observations also appear below. 2003 UT R.A. (2000) Decl. Mag. Observer Oct. 16.39886 2 59 44.23 + 7 21 24.7 18.8 LONEOS Nov. 30.20174 2 29 20.86 + 8 58 14.8 19.3 LINEAR 30.20642 2 29 20.72 + 8 58 15.3 Hergenrother 30.21402 2 29 20.46 + 8 58 17.0 18.5 " 30.24099 2 29 19.45 + 8 58 23.0 19.3 LINEAR 30.25389 2 29 19.05 + 8 58 25.6 19.6 " The following improved orbital elements by B. G. Marsden are from 31 observations, Oct. 16-Nov. 30. T = 2004 Mar. 3.6269 TT Peri. = 5.0941 e = 0.381095 Node = 55.1589 2000.0 q = 3.650531 AU Incl. = 23.4248 a = 5.898372 AU n = 0.0688028 P = 14.325 years NOVAE IN M31 Further to IAUC 8222, K. Hornoch reports the discovery of an apparent nova located at R.A. = 0h42m53s.64, Decl. = +41o18'45".9 (equinox 2000.0), which is 105" east and 157" north of the center of M31. Available R-band magnitudes: Nov. 2.878 UT, [18.6; 9.073, 16.9; 29.883, 18.7. The new object is also absent from many more of his images dating to 2002. Hornoch also reports additional R-band magnitudes of two earlier apparent novae in M31, from images taken by P. Kusnirak and himself: (1) Hornoch's nova on IAUC 8222: Oct. 14.480 UT, 17.8; 17.976, 18.2; Nov. 9.073, 18.4; 29.883, 19.9. (2) the nova announced on IAUC 8226: Oct. 1.990, [19.0; 17.976, 17.9. (C) Copyright 2003 CBAT 2003 December 3 (8248) Daniel W. E. Green
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