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IAUC 9022: COMET 33P/DANIEL; C/2008 U6, C/2008 U9-U16, C/2008 V1-V3

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IAUC number 

                                                  Circular No. 9022
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)
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COMET 33P/DANIEL
     Sometime between Jan. 11 and 30, comet 33P appears to have
undergone an outburst of about 3 mag in total brightness (from mag
about 18 to about 15), according to CCD astrometric observations
contributed to the Minor Planet Center.  CCD observations by K.
Kadota (Ageo, Japan, 0.25-m f/5 reflector) and others indicate an
additional brightening of about 1 mag between Feb. 7 and 20.  A
standard power-law formula (cf. 2008/2009 Comet Handbook, p. 64)
predicts little change in the comet's brightness over this span (T
= 2008 July 20.3 TT).  Recent astrometry, revised orbital elements
by B. G. Marsden, and an updated ephemeris appear on MPEC 2009-D52.


COMETS C/2008 U6, C/2008 U9-U16, C/2008 V1-V3 (SOHO)
     A revised orbit on MPEC 2009-B70 shows C/2008 U6 (cf. IAUC
9021) to be a member of the Meyer group.  Additional near-sun
presumed comets have been found on SOHO website images, with their
"discovery" observations tabulated below -- all Kreutz sungrazers
except for C/2008 V2 (Meyer group).  C/2008 U9 was very diffuse
(mag about 8-8.5).  C/2008 U10 and C/2008 U15 were faint (mag about
8) and diffuse.  C/2008 U11 was slightly diffuse; it appeared small
(mag about 7) in C3 images, with a short, diffuse tail in C2 images.
C/2008 U12 and C/2008 V3 were very diffuse (mag about 8).  C/2008
U13 was stellar in appearance (mag about 7.5) in C3 images, and
quite condensed with no tail in C2 images.  C/2008 U14 was slightly
diffuse and elongated (mag about 8).  C/2008 U16 was small and
condensed (mag about 7.5-8).  C/2008 V1 was slightly diffuse; in C3
images, it was faint (mag about 7.5).  C/2008 V2 was stellar in
appearance (mag about 7).

 Comet        2008 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2008 U9    Oct. 21.621   13 39.7  -12 03   C2     HS   2009-B67
 C/2008 U10        24.521   13 50.7  -13 06   C2     ZX   2009-B70
 C/2008 U11        24.696   13 44.3  -13 52   C3/2   HS   2009-B70
 C/2008 U12        26.329   13 57.7  -13 40   C2     BZ   2009-B70
 C/2008 U13        26.988   13 53.6  -14 38   C3/2   RM   2009-B71
 C/2008 U14        27.454   14 02.9  -14 10   C2     RK   2009-B71
 C/2008 U15        28.413   14 06.6  -14 31   C2     JR   2009-B71
 C/2008 U16        31.079   14 16.7  -15 23   C2     RM   2009-B71
 C/2008 V1    Nov.  2.821   14 24.9  -16 55   C3/2   RM   2009-C46
 C/2008 V2          4.246   14 31.5  -16 07   C2     RK   2009-C46
 C/2008 V3          6.329   14 41.9  -17 25   C2     RM   2009-C46

                      (C) Copyright 2009 CBAT
2009 February 24               (9022)            Daniel W. E. Green

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