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All observing logs tagged with Mare Serenitatis


Location: Billingborough (South Lincolnshire, UK)
From: 2006-05-03 13:17 UT
To: 2006-05-03 13:24 UT
Equipment: Naked Eye
Temperature: 20.7C ...
Dew Point: 9.2C ...
Humidity: 49% ...
Wind Speed: 1.1mph ...
Wind Dir: East North East ...
Pressure: 1011.3hPa ...

Breezy day with lots of broken cloud about — sunny intervals were more the exception than the rule but there was a short time when a sunspot count with the Solarscope was possible.


From: 2006-05-03 13:17 UT
To: 2006-05-03 13:24 UT

With the Solarscope I could still see active areas 875, 878 and 879. Between them I counted 7 sunspots.

Using eclipse shades I checked to see if it was still possible to see area 875 with the naked eye but I was unable to detect it.

Location: Billingborough (South Lincolnshire, UK)
From: 2006-05-03 20:35 UT
To: 2006-05-03 22:45 UT
Equipment: Naked Eye
Meade 10x50 Binoculars
Antares 905
Sky-Watcher Explorer 130M
Temperature: 15.2C ...
Dew Point: 9.1C ...
Humidity: 68% ...
Wind Speed: Calm ...
Pressure: 1013.8hPa ...

Another calm, clear evening, similar to a couple of nights ago but also a lot warmer. It was still light when I first stepped out, I wanted to get things set up as soon as possible and give the 'scopes plenty of time to cool down. Waxing crescent Moon, getting close to first , was in the western sky.

The main plan for the evening was to try and observe comet 73P Schwassmann-Wachmann 3, with a view to trying to track down fragment B and, if possible, any other fragments. Because of this, as with a couple of nights back, I took both the 905 and the 130M out with me.


From: 2006-05-03 20:40 UT
To: 2006-05-03 20:59 UT

While waiting for it to get dark (and while letting the 130M have plenty of time to cool down) I decided to start by viewing Saturn with the 905. After getting the planet lined up in the 'scope I switched to the 6mm eyepiece. The image was crisp and steady, much better than the last observation. Right away the shadow of the planet on the rings and the shadow of the rings on the planet stood out. The Cassini Division kept leaping in and out of view.

Noticed that Titan was obvious close by.

I also noticed that I was getting many fleeting hints of banding on the surface of the planet.

The Moon

From: 2006-05-03 21:00 UT
To: 2006-05-03 21:26 UT

To kill some more time I turned the 905 on the Moon. The first thing that stood out was, in Mare Serenitatis, Dorsa Smirnov. It stood out as a very obvious line, snaking its way up the eastern side of the mare.

Closer to the terminator from Dorsa Smirnov I could pick out a line of 5 small craters, each one casting a very long shadow. On my lunar map only the bottom two are named. The names given are (starting at the bottom of the line) Deseilligny and Sarabhai. I'll have to try and find a more detailed map to get the names for the others.

Further to the north, partly in the terminator, Montes Caucasus looked amazing in the low sunlight. It looked as if someone had thrown a huge pile of rubble onto the lunar surface — the whole thing having a very "bitty" appearance.

Even further to the north Aristoteles stood out really well. The eastern wall of the crater was nicely lit while the rest (floor and western wall) was in total darkness. Adjacent to it Mitchell could be seen with the tops of all of its walls lit but with the floor in total darkness. Close by I could also see Galle was casting a very long shadow.

A short break and a meteor

From: 2006-05-03 21:27 UT
To: 2006-05-03 21:44 UT

Noticed that the Keystone was now quite high and more or less in a good place to observe. Also noticed that the sky still looked quite bright due to the moonlight — I could easily see my shadow cast by the Moon.

Decided to have a short break for a drink before attempting to find and observe the comet.

At 21:37 UT I saw a meteor travel west through the "bowl" of the Plough in Ursa Major.

Comet 73P Schwassmann-Wachmann 3 (plus a meteor)

From: 2006-05-03 21:45 UT
To: 2006-05-03 22:44 UT

Started out with the 10x50 binocular and found what I thought was fragment C of Schwassmann-Wachmann 3. It was much harder to make out than a couple of nights ago — I suspect this was down to the increased interference from the Moon.

Having found the right general area I switched to the 905 with the 32mm eyepiece and couldn't find it. I spent at least 5 minutes looking in what I thought was the right area but could not identify the comet.

At 21:57 UT I saw a meteor travel from the zenith to the eastern horizon, north of the Keystone. It was quite bright but I didn't manage to estimate the peak magnitude.

Finally, at 22:00 UT, I found fragment C of the comet in the 905. It was much less obvious than the last observation, less of a hint of a tail.

At 22:08 UT I switched to the 130M with the 32mm eyepiece and easily found fragment C. The view with the 130M was much better and brighter. The tail was much more obvious.

After some time looking at fragment C I went looking for fragment B with the 905 and the 32mm eyepiece. By 22:27 UT (after about 1 minute of looking) I was sure I'd found it. I had what appeared to be a faint, fuzzy patch, just outside the Keystone and in the same field of view as M13. Whatever it was I was looking at it was much fainter than M13.

At 22:29 UT I took a look at the same location with the 130M and the 25mm eyepiece and found the same object. It was much clearer and more obvious with the 130M and there was a hint of a tail visible. Given the location and the look there was little doubt that I'd located fragment B.

Around 22:36 UT I had a go at finding fragment B with the 10x50s but, due to the eyepieces constantly misting up, I failed and gave up. For a brief moment before they misted up badly I thought I saw C and possibly another fragment but that might have been wishful thinking on my part.

At 22:45 UT I noticed that there was quite a bit of cloud rolling in from the south west. Showers had been forecast for anything from 23:00 UT onwards so I decided to play it safe and call an end to the session so that I could get the 'scopes packed away.


Location: Billingborough (South Lincolnshire, UK)
From: 2005-11-09 21:30 UT
To: 2005-11-09 23:30 UT
Equipment: Naked Eye
Meade 10x50 Binoculars
Temperature: 4.0C
Humidity: 75%

Reasonably clear night, some haze obvious closer to the Moon (which was just past first ). Felt rather cold. Decided to have a session out with chair and binocular, mostly with a view to having a good look at the Moon and also hunt down the clusters in Auriga.

The Moon

From: 2005-11-09 21:35 UT
To: 2005-11-09 22:11 UT

Started out by having a look at the Moon with the binocular mounted on a tripod. Lots of very obvious features were visible on or close to the terminator.

Noted that the terminator was running more or less through the middle of Mare Imbrium and that the shadows of Montes Apenninus looked long and very obvious. Also noticed that Archimedes, Aristillus and Autolycus were standing out really well too. The terminator also seemed to be running pretty much through the middle of Plato.

Towards the Moon's North Pole I could see what appeared to be a rather deep looking crater, in the terminator, with the back wall (this being in relation to the direction of the Sun) brightly lit but with the floor in shadow. Looking at my Lunar map I got the impression that I was looking at Anaxagoras.

Noticed quite a striking ray running diagonally — from "top right" to "bottom left" — through Mare Serenitatis. I could see that it seemed to be heading away from (or towards) a crater which, after looking at my map, appeared to be Atlas.

By 22:11 UT the Moon was heading out of sight behind some trees and it was also being lost behind haze towards the horizon.


From: 2005-11-09 22:16 UT
To: 2005-11-09 22:23 UT
Temperature: 3.7C
Humidity: 77%

By now Orion had mostly risen and it was possible to see M42. Decided to have a look with the binocular mounted on the tripod. At first glance it simply looked like a sparse grouping of stars but, with averted vision, there was a definite hint of nebula. It might just have been my imagination but there did seem to be a hint of the "fan" shape that is so well known from drawings and photographs.

Clusters in Auriga

From: 2005-11-09 22:27 UT
To: 2005-11-09 22:37 UT
Temperature: 3.6C
Humidity: 77%

Swept Auriga for M36, M37 and M38. Found them all with no problems. Each one of them was a very obvious hazy patch — they all look like good targets for the telescope.

Given their appearance in the binocular, if I hadn't known they were all open clusters, I'd have assumed that they were actually globular clusters.


From: 2005-11-09 22:38 UT
To: 2005-11-09 22:47 UT
Temperature: 3.4C
Humidity: 77%

While sweeping around the area near Auriga with the binocular I stumbled upon M35, another open cluster — this time in Gemini. This one looked very much like an open cluster. Again, this looks like it might make for an interesting telescope target.


From: 2005-11-09 22:49 UT
To: 2005-11-09 22:56 UT
Temperature: 3.3C
Humidity: 77%

Given that they were now quite high in the sky I decided to have another look at M45 (AKA The Pleiades). They were too high up to comfortably view them with the binocular on the tripod (it's only a medium-height tripod) so I decided to try my monopod instead (it's actually taller than me when fully extended). This actually worked rather well.

The field looked very rich with stars, some seeming to pop in and out of view as I moved my eyes around. I also noticed something that I don't think I've noticed before: a striking line of stars that have a sort of "dog leg" look to them. For some reason they sort of reminded me of a small, bent version of Kemble's Cascade.


Time: 2005-11-09 22:59 UT

While taking a little break from the binocular I say and just looked at Mars with the naked eye. I realised that this must be the highest and brightest I've seen it in the sky for this apparition. I was tempted to go and get the telescope out to have a look but by the time it would have cooled down enough I'd probably be ready to call it a night. Also, the air wasn't terribly steady anyway so I wouldn't have expected a good view.

NGC 1528

From: 2005-11-09 23:11 UT
To: 2005-11-09 23:24 UT
Temperature: 3.6C
Humidity: 78%

Started sweeping around Perseus and stumbled on what seemed to be a small, tight, hazy cluster. It seemed similar in appearance to the views I'd had of M36, M37 and M38 earlier on in the session. I checked on my Messier and Caldwell charts and couldn't see anything close to the location of the object. I next checked with a more detailed chart and noted that there were a number of NGC objects in the general location. NGC 1444 seemed like the most likely candidate based on location alone.

Knowing that I'd need to do some checking later on I noted that the object was about two binocular field widths away from the "middle" of Perseus (taking the middle to be the area around Mirfak) and at a angle of around 8 o'clock if the general direction of the Double Cluster in Perseus is taken to be 12 o'clock.

Later on, I did some searching on the internet and found a couple of observation reports of NGC 1528, through binoculars, which seemed to have descriptions which matched what I'd seen. I did, however, also find a binocular observation report which suggested that NGC 1545 was a reasonable candidate too. Further checking with Starry Night, and looking at DSS images of the two clusters, suggested that NGC 1528 is the best fit for what I saw — both in its look and also in the look of the field of stars around it.

End of session

Time: 2005-11-09 23:30 UT
Temperature: 3.7C
Humidity: 78%

Cloud was starting to roll in so I decided to call an end to the session.

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