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IAUC 8644: V477 Sct; C/2005 T9-T11, C/2005 U2-U6

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IAUC number

                                                  Circular No. 8644
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)

     S. Mazuk, D. K. Lynch, R. J. Rudy, and C. C. Venturini,
Aerospace Corporation; R. C. Puetter, University of California at
San Diego; R. B. Perry, Langley Research Center, NASA; and B. Walp,
Lick Observatory, report 0.47- to 2.5-micron spectroscopy of V477
Sct (cf. IAUC 8617) with the Lick 3.0-m telescope (+ VNIRIS) at
Nov. 15.094 UT.  The nova showed doubled line profiles with FWHM of
2700 km/s.  The Lyman_beta-fluoresced O I lines were strong, as
were those of H I and He I.  He II was present but weak.  Coronal
lines of [S VIII] and [S IX] were evident, but not those of [Ca
VIII] or [Si VI].  As derived from the O I lines, the reddening is
E(B-V) = 1.2.  A strong continuum increasing toward longer
wavelengths appears to be thermal emission from dust.

COMETS C/2005 T9-T11 AND C/2005 U2-U6 (SOHO)
     Further to IAUC 8640 (where on line 4 the designation should
read C/2005 S13), additional near-sun comets have been found on
SOHO website images -- all the following being Kreutz sungrazers
except for C/2005 T9 (Meyer group).  C/2005 T9 was tiny, stellar,
and too faint for photometry.  C/2005 T10 was very faint and
diffuse.  C/2005 T11 reached mag 4.9 at 10.9 solar radii on Oct.
15.821 UT, as seen in C3 images; in C2 images, it showed a bright,
long, thin tail that reached a length of about 38' at 3.5 solar
radii on Oct. 16.226.  C/2005 U2 and C/2005 U3 were small, very
faint, and stellar in appearance in C3 images, while they were very
faint and diffuse in C2 images.  C/2005 U4 was diffuse and very
faint.  C/2005 U5 was small, very faint, and stellar in appearance.
C/2005 U6 was tiny, faint, and stellar in appearance in C3 images,
and it appeared as a small, faint blob in C2 images.

 Comet        2005 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2005 T9    Oct.  8.226  12 52.3   - 4 00   C2     HS   2005-X52
 C/2005 T10        14.726  13 11.8   - 9 13   C2     HS   2005-X52
 C/2005 T11        15.029  12 57.3   -11 39   C3/2   TH   2005-X52
 C/2005 U2         18.113  13 19.3   -11 00   C3/2   HS   2005-X53
 C/2005 U3         18.513  13 14.5   -11 32   C3/2   HS   2005-X53
 C/2005 U4         19.454  13 30.2   -11 04   C2     HS   2005-X53
 C/2005 U5         21.448  13 30.6   -13 36   C3     TS   2005-X53
 C/2005 U6         23.447  13 39.1   -13 13   C3/2   BZ   2005-X53

                      (C) Copyright 2005 CBAT
2005 December 10               (8644)            Daniel W. E. Green

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