Most southerly views to date

 
From: "Trevor Pitt trevorwilliampitt@PROTECTED [Abingdon Astronomical Society Mailing List]" <aasmail@PROTECTED>
Subject: Most southerly views to date
Date: June 15th 2020
Despite the lack of astro dark, I have been able to get back to some observing and  imaging over this weekend.
The new mount extension  is finished and in place and does seem to work well.  My initial trial showed a bit of vibration on stopping at a location, around 1/2 second, but I had to finish off the welding once I knew it was aligned okay, so now there is no vibration, its all painted and in place. The big advantage is that there is a lot more room in the observatory to move around without disturbing the mount and a lot more comfortable to observe.  
Friday night I went through all the Messier objects that were not visible with the old arrangement, I can now get down to 6 degrees above the horizon in the south.
Its not all good news,M7  the most southerly of all the objects is still hidden from view.  I did mention it to the owner of the house affecting the view, but they seemed reluctant to remove their roof.
At 6 degrees above the horizon, I had a strange reversal of colour, normally i have to lower the red in the background from the light pollution, but in this case, the blue was dominant in the background.
The other issue is that at that low level, atmospheric dispersion is dominant and all the stars become slightly oval in shape with the distortion from the atmospheric lens effect. 
image.png
Here is the finished image of M6 at declination of - 32.25 degrees

image.png
Trevor

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