Observing Log for 2005-06-18

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Location: Billingborough (South Lincolnshire, UK)
From: 2005-06-18 21:25 UT
To: 2005-06-18 23:00 UT
Equipment: Sky-Watcher Explorer 130M

Very light sky plus Moon just past first quarter. The reason for venturing out so early was that this was the first clear night I'd had for a while and I'd just acquired 6mm and 15mm eyepieces from Scopes'n'Skies and I wanted to give them a try out as soon as possible.

Jupiter & 6mm eyepiece

Time: 2005-06-18 21:25 UT

Tried the 6mm first. Jupiter showed up quite nicely. Based on first impressions and a quick at-the-'scope comparison I found that the 6mm gave a more pleasing image than the SkyWatcher-supplied 10mm with the supplied 2x barlow. Made a sketch of what I saw with the 6mm -- noted that I could see a faint star quite close to Jupiter (it obviously wasn't a Jovian moon as they were obvious and the star itself was in the wrong location for that).

Tried the 6mm with the 2x barlow. It was hard to get good focus with this combination. While the image was obviously bigger I couldn't see any obvious increase in detail on the planet -- but I was fighting a warm 'scope, a light sky and a lack of collimation (I must get round to this).

Jupiter & 15mm eyepiece

Time: 2005-06-18 22:16 UT

Jupiter looked excellent in the 15mm eyepiece. Although I could only see the two main bands (no hint of the mottling that I've seen on previous nights but see above regarding what I was working against) the image was bright, crisp and clear.

The Moon

Time: 2005-06-18 22:31 UT onwards

Finally got round to having a good look around the Moon for the first time since getting the telescope.

The first thing that really stood out was the top of the rim of the crater Reiner being highlighted even though the bulk of the crater itself was behind the terminator. Quite an amazing sight. I spent some time trying to have a go at sketching this but after a couple of false starts gave up. I need to do some more practice and, more to the point, I should probably plan my observing of the Moon ahead of time and make up a template or two of what I want to look at.

Spent some time taking in the ray systems of Copernicus, Kepler and Tycho.

With the 15mm eyepiece I got an excellent view of Aristarchus, Herodotus and Vallis Schröteri. With the 6mm the view was even better. Vallis Schröteri looked very detailed. I could also clearly see what appeared to be two small craters in what looked like higher ground to the North of Aristarchus. I noted that these craters appeared to be shown on my Moon map but they were not named.

Iridium Flare

Time: 2005-06-18 23:00 UT (approximate)

After packing up, while heading back into the house, noticed a rather bright Iridium flare high up and around due South.

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Dave Pearson <davep@davep.org>
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