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IAUC 8248: P/2003 UD_16; NOVAE IN M31

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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  Additional unpublished LINEAR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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