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IAUC 8733: 2006du, 2006dv, 2006dw; C/2006 M4; 177P

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IAUC number 

                                                  Circular No. 8733
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)


SUPERNOVAE 2006du, 2006dv, 2006dw
     Three additional apparent supernovae have been discovered on
unfiltered CCD images:  2006du by P. Luckas, O. Trondal, and M.
Schwartz (0.35-m telescope, Perth; cf. IAUC 8713), 2006dv by T.
Puckett and M. Peoples (0.50-m reflector, Ellijay, GA; cf. IAUC
8716), and 2006dw by N. Lee and W. Li (via LOSS/KAIT; cf. IAUC
8732).

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006du  July 18.9    0 05 12.26  -11 29 23.6  17.0  13".2 W, 45".6 N
2006dv  July 20.32  23 15 53.06  + 5 07 50.2  17.7  1".3 W, 6".9 N
2006dw  July 23.25  16 17 43.29  +34 57 55.1  15.8  3".5 W, 1".7 N

Additional magnitudes for 2006du in IC 1529:  1983 Oct. 1, [21.0
(Digitized Sky Survey); 2006 June 10.8 UT, [18.0 (Luckas); July
22.9, 16.7 (Luckas).  Additional magnitudes for 2006dv in UGC 12461:
2005 Aug. 9, [19.4; 2006 July 24.31, 17.5.  Additional magnitudes
for 2006dw:  July 12.24, [19.5; 16.26, 18.3.  The nucleus of the
apparent host galaxy of 2006dw is located 37" east and 142" south
of the center of NGC 6109.


COMET C/2006 M4 (SWAN)
     Twenty-six co-added 15-s CCD images taken by N. Teamo and S. F.
Hoenig (0.35-m reflector, Punaauia, Tahiti) on July 17.2 UT show an
8" nuclear condensation surrounded by a fainter 45" coma (total mag
12.7) and a 2'.1 tail in p.a. 160 deg.  Three combined 30-s
exposures by A. C. Gilmore (1.0-m reflector, Mt. John) on July 17.3
show a 2'.4 tail in p.a. 165 deg and a well-condensed coma about 40"
in diameter.
     Improved parabolic orbital elements to those published on IAUC
8729, taken from MPEC 2006-O17:

     T = 2006 Sept.28.613 TT          Peri. =  62.851
                                      Node  = 148.746   2000.0
     q = 0.77860 AU                   Incl. = 111.822


COMET 177P/BARNARD
     Visual total-magnitude estimates:  July 7.07 UT, 13.2 (J. J.
Gonzalez, Leon, Spain, 0.20-m reflector); 16.42, 10.3 (D. A. J.
Seargent, The Entrance, N.S.W., 25x100 binoculars); 19.91, 9.8 (M.
Meyer, Frauenstein, Germany, 20x100 binoc.); 20.89, 9.1 (Meyer);
22.99, 8.5 (Gonzalez, 7x50 binoc.).

                      (C) Copyright 2006 CBAT
2006 July 24                   (8733)            Daniel W. E. Green

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