From International Astronomical Union Circular
Instituto de Astrofisica de Canarias, writes that nightly observations
made since July 23 in U, B, V, R, and Z broadband filters with
the 1-m Jacobus Kapteyn Telescope show what appears to be the
complete disruption of the comet's nucleus: "The central
condensation was highly condensed and showed the typical 'teardrop'
form on July 23.9 and 24.9 UT, although its brightness decreased
by a factor of about 3 between the two nights. On July 25.9 the
central condensation was seen to be strongly elongated (length
about 15") in p.a. 80 deg, with a very flat brightness distribution.
The condensation's brightness faded further and its length increased
to about 30" and 45"-50" (p.a. 80 deg) on July
26.9 and 27.9, respectively. On July 27.9, there was no evidence
of any local brightness peak that would indicate the presence
of subnuclei. The expansion velocity of the condensation is about
40 m/s, indicating that it is particulate material and not gas.
The gas tail, which virtually disappeared between July 23.9 and
24.9, has reformed as an extension of the major axis of the central