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All observing logs tagged with Elnath


Location: Billingborough (South Lincolnshire, UK)
From: 2006-04-03 14:25 UT
To: 2006-04-03 14:30 UT
Equipment: Naked Eye
Temperature: 12.4C ...
Dew Point: 0.7C ...
Humidity: 45% ...
Wind Speed: 7.9mph ...
Wind Dir: West ...
Pressure: 1016.2hPa ...

Partly cloudy, quite breezy afternoon. Some moments of clear sunshine between the clouds. Got the Solarscope out to have a quick look at the Sun. It was hard to make a really good observation as the wind kept blowing the Solarscope around.


From: 2006-04-03 14:25 UT
To: 2006-04-03 14:30 UT

With the Solarscope I could see that area 865 had developed some more on yesterday. I counted fewer obvious spots but cloud see significant dark lines.

Area 866 seemed a little more developed and area 867 seemed to have developed a second spot.

Using eclipse shades I was able to see the main spot in area 865 with the naked eye.

Location: Billingborough (South Lincolnshire, UK)
From: 2006-04-03 19:05 UT
To: 2006-04-03 20:07 UT
Equipment: Antares 905
Temperature: 7.4C ...
Dew Point: -0.9C ...
Humidity: 56% ...
Wind Speed: 1.1mph ...
Wind Dir: West North West ...
Pressure: 1017.3hPa ...

Reasonably clear night, just the odd cloud floating about, quite breezy with the occasional strong gust. Waxing crescent Moon. Although the Sun hadn't long set and the sky was still quite light I decided to take the 905 outside and set it up with a view to having a look at the Moon — this would also give me the chance to get the finder aligned.

Further testing of the Antares 905

From: 2006-04-03 19:05 UT
To: 2006-04-03 20:07 UT

Spent a little time setting up the 905 and aligning the finder using the Moon as the target. Once that was done I settled down to look at the Moon with the 6mm eyepiece (which I'd finished up with in the holder during the alignment process). The detail along the terminator was excellent, very sharp and no hint of any false colour. Along the limb facing the Sun a lot of violet flare was visible, not so much to be annoying or a problem but it was very noticeable.

Something I was starting to notice was that the gusts of wind were causing a fair bit of vibration in the 'scope. I don't know if it's the mount or the tripod that's the problem (possibly both) it's obvious that this is more of a fair-weather setup or, if it were to be used for critical observations in windy conditions something would have to be done to firm it all up.

Had a look at Saturn next. Even though conditions weren't ideal, seeing wasn't that good and vibrations in the 'scope weren't helping, banding could be seen on the planet and the Cassini Division kept popping in and out of view.

I spent a fair bit of time watching Saturn, it was quite something to see the detail pop in and out of view as conditions improved and then got worse.

Using the 32mm eyepiece I went back to have a nice, wide-field view of the Moon. The flare on the sunward limb was very obvious (but, again, not distracting) and I also noticed that as I moved my eye closer to the eyepiece the flare appeared violet yet when I moved further back from the eyepiece it became obviously yellow. I'm not surprised by any of this, it is to be expected. Like I say above, it isn't at all distracting and lunar observing isn't the main intended use for this 'scope — I purchased it more for cluster observing and things like that.

Couple of things of note during the evening (not via the 'scope): the Moon was very close to Mars and Elnath. In fact, when I first stepped out and the sky was still light enough that only the very brightest stars were visible I thought the Moon was close to Castor and Pollux. It was only as the sky got darker that I realised that I'd been a little disoriented due to Mars' position.

The other thing I noticed during the evening was how many satellites I saw. During most of the winter months (not that I've been out that much this last winter) I don't recall seeing many satellites at all (other than the ISS) — this makes sense of course and the fact that I saw so many during this little session shows that days are getting longer.

By 20:07 UT the sky was getting very hazy and the gusts of wind were making it harder to view much though the 'scope. That, and the fact that I had a streaming nose due to a cold, meant that I packed up. A short session, but a worthwhile one in that it was another useful test of the 905.

I'm still pleased with the purchase.


Location: Billingborough (South Lincolnshire, UK)
From: 2006-01-11 16:51 UT
To: 2006-01-11 16:57 UT
Equipment: Naked Eye
Temperature: 5.5C ...
Dew Point: 1.5C ...
Humidity: 75% ...
Wind Speed: 2mph ...
Wind Dir: West ...
Pressure: 1021.8hPa ...

Mark Smith alerted me to a pass of the ISS that was about to happen so I ventured outside to watch it go over.

International Space Station

From: 2006-01-11 16:51 UT
To: 2006-01-11 16:57 UT

The sky was still light, although the Sun had set. I managed to pick out the ISS when it was something like 20 above the horizon (perhaps a little more). At its maximum altitude (around 69) it was very bright, brighter than I've ever seen it before. I also watched it pass about way between Mars and M45.

Location: Billingborough (South Lincolnshire, UK)
From: 2006-01-11 21:22 UT
To: 2006-01-11 23:00 UT
Equipment: Naked Eye
Sky-Watcher Explorer 130M
Meade 10x50 Binoculars
Temperature: 2.0C ...
Dew Point: -0.1C ...
Humidity: 86% ...
Wind Speed: Calm ...
Pressure: 1024.8hPa ...

First clear night this year and the first clear night I've had free to observe in a month. The Moon was quite high in the sky, phase was waxing gibbous (about 89% of full). The main aim for this session was to observe Saturn (this would be the first telescope observation of the planet since 2005-05-07.


From: 2006-01-11 21:22 UT
To: 2006-01-11 22:10 UT

Got Saturn in the field of view of the 130M, using the 25mm eyepiece with no trouble. Even at such low power the rings were quite obvious. I could also easily see Titan and Rhea. The image was a little unsteady (with some blurring and false colour) but, at this point, the 'scope hadn't really had much time to cool down so I wasn't expecting too much.

Switched to the 6mm. The image wasn't very sharp and was mostly unsteady. However, in steady moments, I was sure I was getting a hint of the Cassini Division.

Decided to play with some of the filters and see what effect they had. Started with the #15 Yellow/Orange filter. With it I thought I could see a good hint of a couple of dark bands on the surface of the planet.

I next tried the #21 Orange and then the #56 Green filters. In both cases I didn't notice any obvious improvement over the view without any sort of filter.

Finally I tried the #80A Medium Blue filter. When using this I'm sure I got a better hint of the Cassini Division than I'd had with any other view.

As a quick test I tried the 6mm eyepiece with the 2x barlow. The view was terrible. This was to be expected as this provides slightly more magnification than the 130M can handle.

I next tried a view with the 10mm eyepiece and the 2x barlow. The view was reasonably good but didn't really seem to show any more detail than any other view I'd had.

A good view of the Cassini Division still eludes me.

Saturn and The Beehive

From: 2006-01-11 22:28 UT
To: 2006-01-11 22:35 UT
Temperature: 1.6C ...
Dew Point: -0.4C ...
Humidity: 87% ...
Wind Speed: 3.5mph ...
Wind Dir: West South West ...

Used the Meade 10x50 binocular to view Saturn and M44 in the same field of view. Looked fantastic! Having spent the best part of the previous hour observing Saturn through the 130M (where the planet was a significant feature in the field of view), this view, with M44 in the field, seemed to make Saturn look very small.

Also noticed that Asellus Australis was nicely framed in the field too. All in all an excellent sight and right in the middle of Cancer.

Moon and Elnath

Time: 2006-01-11 22:36 UT

While looking at the Moon with the naked eye I noticed a bright star close by (about 1 or so away). Against the Moon's brightness it was hard to make out but it was simple to see with the binocular. A quick checked showed that the star in question was Elnath in Taurus

One last view of Saturn

From: 2006-01-11 22:54 UT
To: 2006-01-11 23:00 UT

Decided to have one last look at Saturn before packing up. Used the 6mm eyepiece on the 130M. Had some very steady moments in which I thought I could see a very good hint of the Cassini Division. Also, in this view, the rings stood out really well against the planet.

Also experienced a couple of moments of really bad seeing. This little observation was a really nice example of the "watch and wait" approach to viewing planets. One moment the view was awful, the next it was the best I'd seen it all evening.

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