Swansea Astronomical Society Blog

Friday, November 11, 2011

 

99% full waning gibbous Moon

Between the clouds I was able to capture two overlapping images of the Moon at the prime focus of an f/10, 5" Maksutov with a Pentax K-x DSLR fitted with an IR/UV cut filter.
The images wer combined into a mosaic with Microsoft ICE, a free image mosaic making program program.
Click on the image to get a larger view:


Steve Wainwright

Thursday, November 10, 2011

 

Yerkes Observatory, a palace for astronomers

This evening Dr Rhodri Evans gave a fascinating lecture on the Yerkes Observatory of Chicago University where he worked for a number of years as a Research Associate. This history of astronomy is fascinating and involves the most extraordinary people and Observatories:


As he often does, Rhodri brought one of his daughters with him and she did the honours of picking the winning raffle ticket for the evening:


Rhodri will return next session to continue the story.
Diolch yn fawr Rhodri.

Steve Wainwright

Monday, November 7, 2011

 

Saturday's Sun and Moon

These images were taken through a 120mm apochromatic Refractor with a DMK31 camera
A Baader solar filter was used for the solar image.








Keith Davies
 

The Moon and Jupiter on Sunday night

A Pentax K-x DSLR was fitted with a x2 Barlow and 13 overlapping images were captured of the 87% waxing gibbous Moon using Barlow projection with an 5/10, 5" Maksutov.
Microsoft ICE was used to stitch the images together into a mosaic:
Click on the image to get a larger view:


The seeing conditions were poor so a 20,000 frame AVI was captured of crater Clavius with a DMK21AS and a 2.5x Barlow, and the best 2% of the frames were stacked in Registax 6:

The 'lucky Imaging' technique captured many craterlets on the floor of crater Clavius.

Jupiter was imaged with a Philips SPC880/900 and a x2.5 Barlow. The best 800 frames were stacked.

Two barges are visible in the NEB.

Steve Wainwright

Sunday, November 6, 2011

 

Solar Projection of AR1339 and AR1338

An f/5, 80mm refractor fitted with an 18mm eyepiece and tube extenders was placed on a Merlin Mount and aimed at the Sun by minimising the shadows.
The image of the Sun was focused onto a white card and photographed.
Note that because the image was photographed from the side, the disk is slightly distorted.
The giant, naked eye sunspot group AR1339 and the lesser group 1338 are clearly visible, and AR1340 is just visible.
Click on the image to make it larger.

Solar projection is often described as 'the only safe way to view the Sun' as the only thing that is looked at is the projected image and the viewer's back is to the Sun.
This is NOT a safe procedure. Behind the eyepiece is a white-hot beam of focused sunlight that will burn flesh or eyes if they are momentarily placed there. This procedure should never be done if small children are present and a scope set up in this way should never be left unattended.

Steve Wainwright

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