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All observing logs for month 2007-02 (earliest log first).

2007-02-01


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-01 14:00 UT
To: 2007-02-01 15:00 UT
Equipment: Solarscope
Canon EOS 400D
Temperature: 11.6C ...
Dew Point: 8.8C ...
Humidity: 83% ...
Wind Speed: Calm ...
Pressure: 1025.6hPa ...
Notes:

Mostly clear and still day but with some cirrus cloud about. I was about to take the Solarscope out to do a quick sunspot count when I noticed that a faint circumzenithal arc was visible.

Circumzenithal Arc and Sundog

From: 2007-02-01 14:00 UT
To: 2007-02-01 14:30 UT

The circumzenithal arc was rather faint, nowhere near as good or as obvious as the last one I saw. However, I went indoors and got my Canon EOS 400D and tried to take some images. The following image is the best of that bunch. The arc is hard to see, it's in the bottom half of the picture.

Circumzenithal Arc

I then noticed that there was a sundog to the right of the Sun. This was quite bright and had some colour to it.

Sundog to right of Sun

I watched the sundog for a short while as it started to fade. I also noticed that the arc had faded to the point that it was almost impossible to see.

Sun

From: 2007-02-01 14:35 UT
To: 2007-02-01 14:40 UT

Now that the display of the circumzenithal arc and sundog had faded I got the solarscope out and did a sunspot count.

Active area 940 was still visible. It still had 1 large spot (that now had an obvious penumbra) but I could also now count 6 small faint spots in a chain close to it.

New active area 941 was visible with 1 dark spot.

Circumzenithal Arc and Sundog Again

From: 2007-02-01 14:43 UT
To: 2007-02-01 15:00 UT

The circumzenithal arc was visible again, still faint, but noticeable. I had a go at taking some more photographs. Again, it's rather hard to see in the image:

Circumzenithal Arc

The following image is the previous one, heavily processed in an attempt to better bring out the arc:

Circumzenithal Arc

I then noticed that a sundog had formed to the left of the Sun. This one was also bright and had a fair bit of colour to it too:

Sundog to the left of Sun

I watched for a short while longer as the arc and the sundog came and went as the clouds moved and then finally returned to my office at around 15:00 UT.


2007-02-02


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-02 13:00 UT
To: 2007-02-02 13:05 UT
Equipment: Solarscope
Temperature: 10.9C ...
Dew Point: 5.7C ...
Humidity: 70% ...
Wind Speed: 2.6mph ...
Wind Dir: West ...
Pressure: 1030.7hPa ...
Notes:

Partly cloudy day. During a good clear spell I took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-02 13:00 UT
To: 2007-02-02 13:05 UT

Active area 940 was still visible with 2 small spots and a 1 relatively big circular spot that had a visible penumbra.

Active 941 was still visible with 1 dark spot that also had a visible penumbra.


2007-02-03


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-03 12:50 UT
To: 2007-02-03 12:55 UT
Equipment: Solarscope
Temperature: 8.9C ...
Dew Point: 2.4C ...
Humidity: 65% ...
Wind Speed: Calm ...
Pressure: 1036.8hPa ...
Notes:

Very clear day. Took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-03 12:50 UT
To: 2007-02-03 12:55 UT

Active area 940 was still visible with 3 small spots and looked pretty much the same as it did yesterday.

Active 941 was also still visible with 1 dark spot and also looked pretty much the same as it did yesterday.


2007-02-04


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-04 12:55 UT
To: 2007-02-04 13:00 UT
Equipment: Solarscope
Temperature: 6.6C ...
Dew Point: 3.0C ...
Humidity: 78% ...
Wind Speed: Calm ...
Pressure: 1028.5hPa ...
Notes:

Lots of very thin cloud about but, despite this, I took the Solarscope out to do a quick sunspot count through the cloud.

Sun

From: 2007-02-04 12:55 UT
To: 2007-02-04 13:00 UT

Active area 940 was still visible although, unlike yesterday, only the single main spot was visible (this may have been down to the fact that I was observing via thin cloud).

Active 941 was also still visible with 1 dark spot and also looked pretty much the same as it did yesterday.


2007-02-05


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-05 13:30 UT
To: 2007-02-05 13:35 UT
Equipment: Solarscope
Temperature: 6.0C ...
Dew Point: 1.9C ...
Humidity: 75% ...
Wind Speed: 2.2mph ...
Wind Dir: North North West ...
Pressure: 1015.0hPa ...
Notes:

Very clear day. Took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-05 13:30 UT
To: 2007-02-05 13:35 UT

Active areas 940 and 941 were both still visible with a single dark circular spot each. Both had a visible penumbra.


2007-02-06


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-06 13:10 UT
To: 2007-02-06 13:15 UT
Equipment: Solarscope
Temperature: 4.3C ...
Dew Point: -1.4C ...
Humidity: 67% ...
Wind Speed: Calm ...
Pressure: 1003.6hPa ...
Notes:

Very clear day. Took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-06 13:10 UT
To: 2007-02-06 13:15 UT

Active areas 940 and 941 were both still visible with a single dark circular spot each. Both had a visible penumbra and looked more or less the same as yesterday.

Area 940 was starting to get close to the limb of the Sun.


2007-02-07


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-07 13:20 UT
To: 2007-02-07 13:25 UT
Equipment: Solarscope
Temperature: 3.8C ...
Dew Point: -0.1C ...
Humidity: 76% ...
Wind Speed: Calm ...
Pressure: 998.4hPa ...
Notes:

Very clear and cold day. Took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-07 13:20 UT
To: 2007-02-07 13:25 UT

Active area 940 was still visible with a single spot. Now very close to the limb of the Sun.

Active area 941 was still visible with 1 spot and it looked pretty much the same as yesterday.


2007-02-14


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-14 13:50 UT
To: 2007-02-14 13:55 UT
Equipment: Solarscope
Temperature: 9.4C ...
Dew Point: 4.7C ...
Humidity: 73% ...
Wind Speed: 3.8mph ...
Wind Dir: North West ...
Pressure: 1000.0hPa ...
Notes:

Mostly cloudy day. Had a brief clear but hazy spell so took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-14 13:50 UT
To: 2007-02-14 13:55 UT

No spots or other marks were visible on the Sun.


2007-02-21


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-21 10:20 UT
To: 2007-02-21 10:25 UT
Equipment: Solarscope
Temperature: 9.8C ...
Dew Point: 7.7C ...
Humidity: 83% ...
Wind Speed: Calm ...
Pressure: 1001.6hPa ...
Notes:

Partly cloudy morning. Given that I'd not had a clear day, free to observe, for a while I took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-21 10:20 UT
To: 2007-02-21 10:25 UT

No spots or other marks were visible on the Sun.


2007-02-26


Location: Billingborough (South Lincolnshire, UK)
From: 2007-02-26 14:10 UT
To: 2007-02-26 14:15 UT
Equipment: Solarscope
Temperature: 9.4C ...
Dew Point: 2.7C ...
Humidity: 63% ...
Wind Speed: 4.2mph ...
Wind Dir: West ...
Pressure: 1010.7hPa ...
Notes:

Partly cloudy day. Had a brief clear spell so took the Solarscope out to do a quick sunspot count.

Sun

From: 2007-02-26 14:10 UT
To: 2007-02-26 14:15 UT

New active area 944 was visible. Just 1 small round spot with a hint of a penumbra around it.


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