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IAUC 8585: 2005dj; 2005dg, 2005dh; C/2005 O4, O5, O6, P1, P2

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IAUC number 

                                                  Circular No. 8585
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)


SUPERNOVA 2005dj IN UGC 3545
     T. Boles, Coddenham, England, reports the discovery of an
apparent supernova (mag 16.6) on unfiltered CCD images taken on
Aug. 18.086 and 19.001 UT with a 0.35-m reflector.  The new object
is located at R.A. = 6h49m58s.41, Decl. = +61o37'08".5 (equinox
2000.0), which is approximately 20".0 east and 16".5 south of the
center of UGC 3545.  Nothing is visible at this location on Boles'
images from 2005 Apr. 3 and Jan. 2 (limiting mag 19.5) or on
Digitized Sky Survey images from 1998 (limiting red mag 21.0) and
1995 (limiting blue mag 20.0).


SUPERNOVAE 2005dg AND 2005dh
     M. Salvo, B. Schmidt, T. Davis, and S. Sankarankutty,
Australian National University (ANU), report that a spectrogram
(range 350-900 nm), obtained with the ANU 2.3-m telescope (+
Double-Beam Spectrograph) on Aug. 15.40 UT, shows SN 2005dh (IAUC
8583) to be a type-Ia supernova near maximum light; adopting the
NED recession velocity for the host galaxy (from the RC3 Catalogue)
the expansion velocity of the Si II 635.5-nm line is around 16600
km/s.  A spectrogram (range 340-900 nm), obtained on Aug. 16.70,
shows SN 2005dg (IAUC 8581) to be a type-Ic supernova a few days
past maximum light.


COMETS C/2005 O4, O5, O6, P1, P2 (SOHO)
     K. Battams (Interferometrics, Inc., and Naval Research
Laboratory) reports measurements for additional tailless comets
found on SOHO website images (cf. IAUC 8584); all were Kreutz
sungrazers except for C/2005 O5 (Meyer group).  All five objects
had a stellar appearance except for C/2005 P1 (which appeared very
diffuse only in the single C2 image, but stellar in the C3 images,
where it reached mag about 6.1 at 12.0 solar radii on Aug. 6.071
UT).  C/2005 O5 and C/2005 P2 were extremely faint.  C/2005 O4
reached mag about 6.5 at 12.3 solar radii on July 24.512.  C/2005
O6 reached mag about 5.5 at 10.6 solar radii on July 26.888.

 Comet       2005 UT       R.A.(2000)Decl.  Inst.  F    MPEC
 C/2005 O4   July 23.971   7 54.6   +17 35   C3    TH   2005-Q04
 C/2005 O5        26.079   8 14.6   +20 37   C2    TH   2005-Q04
 C/2005 O6        26.096   8 01.3   +16 43   C3/2  TH   2005-Q04
 C/2005 P1   Aug.  5.431   8 39.5   +14 57   C3/2  TS   2005-Q04
 C/2005 P2         5.431   8 44.3   +15 32   C3    TS   2005-Q04

                      (C) Copyright 2005 CBAT
2005 August 19                 (8585)            Daniel W. E. Green

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