Observing Log for 2006-07-12

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Location: Billingborough (South Lincolnshire, UK)
From: 2006-07-12 12:55 UT
To: 2006-07-12 13:00 UT
Equipment: Solarscope
Temperature: 27.5C ...
Dew Point: 11.8C ...
Humidity: 38% ...
Wind Speed: Calm ...
Pressure: 1021.1hPa ...

Warm, clear and calm day. Took the Solarscope out to do a sunspot count.


From: 2006-07-12 12:55 UT
To: 2006-07-12 13:00 UT

No visible sign of active area 899 today. No markings of any kind were visible on the surface of the Sun.

Location: Billingborough (South Lincolnshire, UK)
From: 2006-07-12 21:20 UT
To: 2006-07-12 22:25 UT
Equipment: Antares 905
Temperature: 21.4C ...
Dew Point: 12.2C ...
Humidity: 56% ...
Wind Speed: Calm ...
Pressure: 1020.0hPa ...

Clear night but with a good hint of haze about. Quite warm. The sky was still light but I decided to get the 905 out to have a look at Jupiter.


From: 2006-07-12 21:20 UT
To: 2006-07-12 21:56 UT

Using the 905 with the 6mm lens I had a pretty good view of Jupiter right away. All of the four main Jovian moons were visible, all on one side of the planet. Ganymede was furthest out and Io, Europa and Callisto were closer in to the planet, bunch up in a line that ran diagonal to the planet. Also close by, "above" Jupiter, I could see TYC5575-473-1.

Detail on the planet itself was pretty good with both the main bands showing some mottling and colour changes towards both the poles standing out.

I spent some time just observing, watching and waiting for very steady moments. At no time did the view get any better than my initial view but there were times when the image would deteriorate quite rapidly.

Starting at 21:43 UT, and given that the view was generally pretty good, I decided to test some of my filters to get a feel for what difference they made. The #15 yellow/orange didn't seem to given any improvement, neither did the #21 orange. In both cases they appeared to make it harder to make out any detail.

I next tried the #56 green filter and this appeared to give a slightly improvement. The contrast of the two main bands against the rest of the planet seemed to be improved.

Finally tried the #80A medium blue filter. This gave a very obvious improvement. The variation in the shades over the whole disc really stood out. Much better than with the other filters (or without a filter).

At 21:56 UT I decided to have a short break.

A Hedgehog, and end of session

From: 2006-07-12 22:10 UT
To: 2006-07-12 22:25 UT

During the break, while sitting with a drink and just admiring the sky, I kept hearing odd sounds on the lawn. While I'm used to hearing my cat playing in the garden while I observe, this was different. I kept listening and finally hunted down the source of the noises:

A Hedgehog

A hedgehog was having a wander around the lawn, probably on the hunt for something to eat. Sadly the only thing I had with me to take an image was my mobile phone, and it's not terribly good at taking pictures at night.

After being distracted by the visitor for some time I noticed that the sky seemed more hazy and was becoming quite washed out (probably due to the just-past-full Moon rising) so, given that and the fact that I needed to be up for work in the morning, I decided to call it a night.

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