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IAUC 8548: 2005cm; C/2005 H4-H9; C/2005 K2

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IAUC number

                                                  Circular No. 8548
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVA 2005cm IN IC 5142
     Further to IAUC 8541, L. A. G. Monard reports his discovery of
an apparent supernova on unfiltered images taken on June 20.124 (at
mag about 16.9) and 20.779 UT (mag about 16.8).  SN 2005cm is
located at R.A. = 21h55m17s.72, Decl. = -65o30'48".3 (equinox
2000.0), which is 16" west and 13" south of the nucleus of IC 5142.
Nothing is visible at this location on an image taken by Monard on
June 5.085 (limiting red mag 18.5) or on an image of the Digitized
Sky Survey (limiting red mag 20.5).

COMETS C/2005 H4-H9 (SOHO)
     Following are the initial available positions for additional
comets found on SOHO website images (continuation to IAUC 8547);
all are Kreutz sungrazers except for C/2005 H7 (no known group
membership) and C/2005 H9 (Meyer group).  K. Battams notes that
C/2005 H4 was faint and diffuse (yielding only five images due to
data gaps), peaking in brightness at mag about 8.1 at 6.4 solar
radii (Apr. 21.993 UT).  C/2005 H5 had a diffuse 'teardrop' shape,
reaching mag about 7.2 at 6.8 solar radii (Apr. 24.851).  C/2005 H6
was very faint and elongated; it reached mag about 8.1 at 5.5 solar
radii (Apr. 25.129).  C/2005 H7 was very small (one or two pixels
in size) and stellar, reaching mag about 7.4 at 6.2 solar radii
(Apr. 25.226).  C/2005 H8 was very small and diffuse, reaching mag
about 7.9 at 6.2 solar radii (Apr. 26.268).  C/2005 H9 was diffuse
and elongated, measuring about 34" in length when it reached peak
brightness at mag about 7.4 (at 7.0 solar radii) on Apr. 29.018.

 Comet       2005 UT       R.A.(2000)Decl.  Inst.  F    MPEC
 C/2005 H4   Apr. 21.976   2 05.8   +11 13   C2    CL   2005-K44
 C/2005 H5        24.826   2 17.1   +12 07   C2    TH   2005-K44
 C/2005 H6        25.101   2 14.7   +11 51   C2    RK   2005-K44
 C/2005 H7        25.201   2 04.8   +13 00   C2    RK   2005-K44
 C/2005 H8        26.226   2 21.7   +12 28   C2    BZ   2005-K44
 C/2005 H9        28.811   2 30.3   +15 26   C2    BZ   2005-M14

     J. A. Farrell, Jamez Springs, NM, reports the following
separations (and 1-sigma errors), all in p.a. 47.4 deg, of the
secondary component to the main nuclear condensation of this comet
(cf. IAUC 8543, 8545) from CCD images taken with a 0.4-m reflector:
June 13.17 UT, 38".1 +/- 0".7; 14.17, 40".0 +/- 0".4; 17.16, 43".1
+/- 0".8.
                      (C) Copyright 2005 CBAT
2005 June 20                   (8548)            Daniel W. E. Green

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