2005 Oct. 24-25 (12 comets)
I observed 12 comets visually on October 24 and 25 in Kita-karuizawa,
Gunma, Japan.
It was completely cloudy in the evening on Oct. 24. But after the
sunset, the clouds started disappearing. I could see stars through
some fine areas among thin clouds at first, then the sky became
completely fine. The sky was clear even around the moon rise. But
while the moon was getting higher, the sky became somewhat dim (not
clear).
I could see many meteors because it was the peak of Orionids. I also
watched Mars, very large and completely round orange ball with some
dark areas.
It was fine until the evening on Oct. 25. But the sky was covered with
thin clouds after sunset. It became cloudy after midnight.
Oct. 24 13.1 mag Dia. 1.6' DC 4-5 (40.0-cm reflector 144x)
Finally, I could observe it again after several cloudy
nights. It is bright still now, easy to see under the
moon light. Moderately condensed.
Oct. 24 13.5 mag Dia. 0.5' DC 5 (40.0-cm reflector 257x)
Hard to see due to the moon light, but I could see a
small, moderately condensed comet. I could not see a
15-mag star near by the comet. I could not confirm it on
the next day because of clouds.
Oct. 24 13.6 mag Dia. 0.9' DC 2 (40.0-cm reflector 144x)
Oct. 25 13.5 mag Dia. 1.1' DC 3 (40.0-cm reflector 144x)
I could observe it again after several cloudy nights. It
is bright and clearly visible still now because locating
overhead and the sky was clear. Diffuse, flat surface, and
the contour was not clear, which are typical features of
dust rich comets.
Oct. 24 11.7 mag Dia. 1.7' DC 6 (40.0-cm reflector 144x)
Oct. 25 11.2 mag Dia. 1.3' DC 5 (40.0-cm reflector 144x)
It becamse large. The central condensation was not so
sharp as before. Now it looks like an ordinary small
comet. But moderately condensed still now and easy to
see. Maybe the tail was also visible.
Oct. 24 fainter than 13.8 mag Dia. 0.7' (40.0-cm reflector 257x)
Not visible. Very near by the half moon. The field was
covered with many faint stars, so it was hard to confirm a
diffuse faint comet.
Oct. 24 13.2 mag Dia. 1.3' DC 0-1 (40.0-cm reflector 144x)
Unexpectedly, it was visible still now, although I had
imagined it already became too faint. Extremely diffuse
and faint. Observable all night.
Oct. 24 12.8 mag Dia. 1.2' DC 6 (40.0-cm reflector 144x)
Oct. 25 12.8 mag Dia. 1.3' DC 4 (40.0-cm reflector 144x)
Moderately condensed and clearly visible locating
overhead. I heard that the comet has been brightening and
it was 13.0 mag in early October. So I had imagined it
became much brighter. But actually, it was around 13 mag
still now.
Oct. 24 12.6 mag Dia. 1.5' DC 3 (40.0-cm reflector 144x)
New comet just discovered. Very low in the evening, but I
could see it. It was diffuse. Fortunately I could have a
fine area in this direction for a short time. The position
was consistent with John Drummond's observation posted to
comets-ml.
Oct. 24 fainter than 12.5 mag Dia. 0.8' (40.0-cm reflector 144x)
Getting higher, but already too faint to see. It has gone while
I could not observe it several cloudy nights.
Oct. 24 12.8 mag Dia. 1.2' DC 1 (40.0-cm reflector 144x)
Unexpectedly, I could see an extremely diffuse large object at
the position. I have not heard any information of recent
outbursts.
Oct. 24 13.5 mag Dia. 1.2' DC 4 (40.0-cm reflector 144x)
CCD observers reported as 15 mag. But unexpectedly, it was
visible visually.
Oct. 24 fainter than 12.4 mag Dia. 0.9' (40.0-cm reflector 144x)
I could not observe it due to bad weather when the comet was
bright. I could observe it finally, but it was already too
faint to see. The low sky was not clear in the morning and hard
to see faint stars.
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