Observing Log for 2006-08-15

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Location: Billingborough (South Lincolnshire, UK)
From: 2006-08-15 16:10 UT
To: 2006-08-15 16:15 UT
Equipment: Solarscope
Temperature: 19.3C ...
Dew Point: 11.6C ...
Humidity: 61% ...
Wind Speed: Calm ...
Pressure: 1001.2hPa ...

Another very cloudy day, overcast for most of it. Late on in the afternoon there was a brief break in the cloud so took the Solarscope out to do a quick sunspot count.


From: 2006-08-15 16:10 UT
To: 2006-08-15 16:15 UT

Conditions were pretty bad (although not quite as bad as yesterday) but briefly clear enough that a view with the Solarscope was possible. Right away I could see active area 904. The main feature of the area was a very large spot that had a very dark umbra. Its penumbra was also very impressive with some detail in it visible — its outer edge also seemed to be quite dark and very well defined.

Close by was a pair of very dark spots which appeared to be sharing a common penumbra. Both of them also had a very dark looking umbra.

As well as the three big spots I could also make out three smaller spots close by.

Because the area was so impressive I went inside to get a pencil and some paper so that I could make a sketch but, by the time I got back outside, the gap in the clouds had passed and there was no sign of another gap coming up. Also, because of this, I never got to try another naked-eye view.

Page last modified: 2013-04-09 09:19:19 UT
Dave Pearson <davep@davep.org>
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