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IAUC 8535: P/2005 K3; P/2005 L1

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                                                  Circular No. 8535
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/2005 K3 (McNAUGHT)
     R. H. McNaught reports his discovery of a comet (discovery
position below) with the 0.5-m Uppsala Schmidt in the course of the
Siding Spring Survey.  On May 20.8 and 21.8 UT, there was a
slightly diffuse head with a narrow tail 30" long in p.a. 240 deg.
On May 29.7, the appearance of the slightly diffuse head was much
the same, but the tail was less obvious in the moonlight.  On June
1.8, in excellent seeing, there was again a weak tail to the
southwest, as well as an almost stellar central condensation.

     2005 UT             R.A. (2000) Decl.       Mag.
     May  20.79323   23 42 17.23   -11 03 31.6   17.3

The initial astrometric observations, the following very
preliminary elliptical orbital elements, and an ephemeris are given
on MPEC 2005-L03.

     T = 2005 Aug. 22.985 TT          Peri. =  24.063
     e = 0.45244                      Node  = 350.221   2000.0
     q = 1.43611 AU                   Incl. =  15.835
       a =  2.62276 AU     n = 0.232042     P =   4.25 years


COMET P/2005 L1 (McNAUGHT)
     McNaught reports his discovery of another comet (discovery
position below) with the 0.5-m Uppsala Schmidt in the course of the
Siding Spring Survey.  On June 2.7 UT, 60-s exposures showed a very
weak, diffuse coma extending westward up to 10".  After placement
on the 'NEO Confirmation Page', observations were reported by
others, including S. Foglia (Osservatorio Astronomico di Suno,
0.4-m f/4 reflector), who described the object as diffuse.  On June
3.5, McNaught described the appearance as almost stellar, with a
10" diffuse tail to the west.

     2005 UT             R.A. (2000) Decl.       Mag.
     June  2.66008   16 43 25.63   -11 51 02.4   16.7

The following orbital elements are from MPEC 2005-L30:

     T = 2005 Dec. 15.369 TT          Peri. = 149.901
     e = 0.20783                      Node  = 138.300   2000.0
     q = 3.14774 AU                   Incl. =   7.745
       a =  3.97358 AU     n = 0.124432     P =   7.92 years

                      (C) Copyright 2005 CBAT
2005 June 7                    (8535)            Daniel W. E. Green

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