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IAUC 8536: C/2005 L2; C/2005 L3

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                                                  Circular No. 8536
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 C/2005 L2 (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; 60-s exposures on June 2.6 UT showed the
images to appear soft and probably cometary in reasonably good
seeing.  Exposures on June 3.4 showed the object to be nearly
stellar with a 10" narrow tail in p.a. 90 deg.

     2005 UT             R.A. (2000) Decl.       Mag.
     June  2.55561   13 22 35.46   -47 47 28.6   18.5

The following preliminary parabolic orbital elements are from MPEC
2005-L31, where an ephemeris also appears:

     T = 2005 July  8.504 TT          Peri. = 292.454
                                      Node  = 155.523   2000.0
     q = 3.19950 AU                   Incl. = 152.809


COMET C/2005 L3 (McNAUGHT)
     R. H. McNaught has reported yet another discovery of a comet
(discovery position below) with the 0.5-m Uppsala Schmidt in the
course of the Siding Spring Survey; 60-s exposures on June 3.8 UT
showed a condensation of diameter 10", while 20-s exposures on June
4.6 showed diameter about 8" in worse seeing.  Observations by A. C.
Gilmore (Mt. John Observatory, 1.0-m f/7.7 reflector) on June 4.6
showed the object to be slightly more diffuse than the surrounding
stars, although the object's nature was unclear in poor seeing on
June 5.6.

     2005 UT             R.A. (2000) Decl.       Mag.
     June  3.67556   21 36 01.71   -33 05 00.3   17.7

The initial astrometric observations, the following very
preliminary parabolic orbital elements, and an ephemeris appear on
MPEC 2005-L17.

     T = 2008 Jan. 10.955 TT          Peri. =  50.099
                                      Node  = 289.093   2000.0
     q = 5.33517 AU                   Incl. = 138.781

                      (C) Copyright 2005 CBAT
2005 June 7                    (8536)            Daniel W. E. Green

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