[IAUC] IAUC 9022: COMET 33P/DANIEL; C/2008 U6, C/2008 U9-U16, C/2008 V1-V3 [25139-2009/08-R1]
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Mar Feb 24 04:05:52 ARST 2009
Circular No. 9022
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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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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