Observations – Sunday 26 August 2012

Location: Cloud Farm, Exmoor. Somerset-Devon border.
Weather:clear to mixed cloud. Sheltered site but cloud cover changing all the time due to strong winds
Highlights: Milky Way, Pleiades, M45, Jupiter, Venus,

As mentioned in a earlier post I was heading off to Exmoor for a camping weekend with friends, at the excellent Cloud Farm campsite. I had hoped for clear skies but accepted that may not happen. I took the scope in case but the weather forecast wasn’t exactly hopeful. The first night, Saturday night, was too cloudy to make it worth getting the scope out despite the dark skies. In the few gaps there were, I was able to see as may stars with the naked eye as I get with the scope back home. Had a bit of a poke around with the binoculars though.
Having gone to bed I awoke around 4:00am Sunday morning needing the toilet. Leaving the tent, I looked up and despite not having my contact lenses in or glasses on, I was blown away by the sky. It was clear and the sheer number of stars was a bit confusing to be honest. It took me a few moments to get my bearings. Even with my blurred vision I could make out the Milky Way streaking across the sky from west to east, using Cygnus as a confirmation. The bright blueish glow around the Pleides cluster (M45) was also evident to the East with Jupiter shining brightly not far away. That’s my Messier count to 5/110.

I then rather foolishly went back to bed but found I couldn’t sleep knowing such a magnificent sky was out there.

So I got up again and set up the scope. By the time I had it aligned and balanced, it was no longer as dark and the clouds were coming in again. I spent my time observing and tracking Jupiter first, and a little later Venus rose above the hillside.
Even through the 9×50 RACI I could make out a couple of the Galilean moons and with the 6mm eyepiece on Jupiter I could clearly see all 4. More excitingly I could make out banding. I’d not seen this before through my Skywatcher 130M. I had seen the banding before, at a Stargazing live event run by Birmingham Astronomical Society at the Mailbox, through a 900mm refractor.
I made a sketch of the banding, remembering that the view was inverted through the eyepiece. I couldn’t see the Great Red Spot.

The sky was lightening as dawn approached, and Venus popped up over the hillside to the East. I tracked and observed that for a while, observing it shining brightly at half phase.
It was daylight by then and my fellow campers were starting to rise as I was packing up at around 6:20. I went back to bed for an hour or two.

Unfortunately Sunday evening was pretty cloudy with quite a bit of mist so no observing that night, just a bit of a late night ukulele singalong around the campfire instead. It turned to rain about 1:00am so there was no late night/early morning viewing to be had. It was worth taking the scope with me though, for the views of Jupiter and Venus the previous morning. It’s just a shame I didn’t know how clear the sky was whilst I slept else I’d have been up and out sooner to make the most of the dark skies.

Update: 10 September 2012. I was watching The Sky At Night this evening. In the night sky section, they were discussing Jupiter and how the Northern Equatorial Belt is rather thick and complex at the moment. The showed the image below, which I have cheekily screenshot from iPlayer, (inc the copyright for credit). I’m quite chuffed at the similarity between this and my sketch. I had noted and captured that thicker band.

Retrospective Stargazing – 5 Years Later

I’m planning a trip to Exmoor soon and was looking at some old photos from my Flickr last time I went there. I didn’t have a telescope then but I did take a couple of longer exposure shots of the sky with my SLR on a tripod.

Whilst looking at the photo I naturally became curious about which stars and constellations were in the shot. To help me with this I took a look at the exif info for the photo to get the date and time it was taken. Incidentally, knowing what I know now and how I remember of the skies from that visit, I’m surprised there aren’t more stars visible in this shot. However from the exif I see that I took this 30s exposure at ISO100. Next time I’ll bump that up considerably.
A quick bit of Google map work gave me the longitude and latitide of the location and I recall from the orientiation of the site that the shot was taken pretty much facing south.
Plugging all this into SkySafari gave me an exact starmap for that time and place. That’s pretty cool.
I see then that that’s Scorpio just above the rising hillside on the right. Three stars in a slight rising curve pointing towards the three in a vertical line. The central orange one of the three on the curve is Antares.

What excited me though was discovering that the really bright star in the centre of the sky isn’t a star at all. That’s Jupiter that is. I hadn’t realised that at the time and nor in the period since.