[IAUC] IAUC 8739: V4332 Sgr; C/2006 L6-L8, C/2006 M5-M9, C/2006 N1-N3 [25139-2007/05-R1]

[IAUC mailing list]

                                                  Circular No. 8739
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en 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)


V4332 SAGITTARII
     D. K. Lynch, R. W. Russell, and R. Ford, The Aerospace
Corporation; H. B. Hammel, Space Science Institute (SSI); and M. L.
Sitko, University of Cincinnati and SSI, report 3- to 14-micron
spectroscopy of V4332 Sgr (cf. IAUC 5944, 5945) on Aug. 7.35 UT
using BASS at the Infrared Telescope Facility.  V4332 Sgr showed a
moderate infrared excess between 10 and 13 microns.  The excess was
nearly flat in units of W cm**-2 microns**-1 vs. wavelength, with a
slight increasing brightness trend toward longer wavelengths.
Possible weak emission features were present at 11.1 and 12.7
microns.  There was a quasi-continuum between 3 and 9 microns that
was too narrow to be fitted by a black-body function.  Derived
magnitudes for V4332 Sgr were L = 6.7 +/- 0.3, M = 5.7 +/- 0.2, N
[narrow, 10.3 microns] = 5.8 +/- 0.5.


COMETS C/2006 L6-L8, C/2006 M5-M9, C/2006 N1-N3 (SOHO)
     Additional Kreutz sungrazing comets have been found on SOHO
website images (cf. IAUC 8738) -- all very faint except where noted
below.  C/2006 L6, C/2006 M5, C/2006 M8, and C/2006 M9 were
slightly diffuse (and generally small), while C/2006 L7, C/2006 L8,
and C/2006 M7 were diffuse.  C/2006 M9 was also found by T. Chen.
C/2006 L5-L8 and C/2006 M5-M7 peaked at mag about 7.5 or fainter.
C/2006 N1 was tiny, faint, and stellar in appearance in C3 images;
in C2 images, it was diffuse and very faint with a hint of
elongation.  C/2006 N2 was small and stellar in appearance, peaking
at mag about 6.5.  C/2006 N3 appeared stellar in C3 images, peaking
at mag approximately 5; in C2 images, it was rather condensed with
no tail, fading rapidly.

 Comet       2006 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2006 L6   June  8.833   5 04.9   +21 00   C2     GS   2006-O21
 C/2006 L7        10.450   5 10.9   +21 07   C2     TH   2006-O21
 C/2006 L8        14.617   5 27.1   +21 24   C2     HS   2006-O21
 C/2006 M5        16.521   5 34.6   +21 30   C2     TC   2006-O21
 C/2006 M6        19.064   5 44.4   +21 38   C2     TH   2006-O21
 C/2006 M7        22.438   5 57.2   +21 40   C2     HS   2006-O21
 C/2006 M8        25.064   6 07.5   +21 47   C2     HS   2006-O62
 C/2006 M9        27.163   6 15.7   +21 44   C2     HS   2006-O62
 C/2006 N1   July 11.821   7 12.0   +20 10   C3/2   SF   2006-O62
 C/2006 N2        13.971   7 17.4   +19 55   C3     HS   2006-O62
 C/2006 N3        14.363   7 19.5   +17 46   C3/2   WX   2006-O62

                      (C) Copyright 2006 CBAT
2006 August 9                  (8739)            Daniel W. E. Green