Swansea Astronomical Society Blog
Saturday, April 17, 2010
Crescent Moon
Click on the image to see a larger view.
Even though the sky was bright, the red filter darkened the sky and also eliminated the effects of atmospheric dispersion.
I then changed the scope for a 6" SCT with a 6.3 focal reducer and repeated the exercise, again using a red filter to darken the evening sky and remove atmospheric dispersion. The final mosaic produced by iMerge was then further processed in The Gimp. Click on the image below to see the full-size image.
You will have to scroll the image up and down, left and right to see the whole thing.
Steve Wainwright
Saturn last night
Saturn and Sombrero Galaxy
Venus and the crescent Moon
I mounted my Fujifilm F-450 on a tripod. The ISO value was set to 80. A timed shutter release allowed the picture to be taken with no camera shake and the camera used an exposure of 1/6s:
Click on the image to see a larger view.
Steve Wainwright
Friday, April 16, 2010
Looping prominence and an afocal image
The AVIs were stacked in Registax and combined into a single image using Andrew Sprott's Solar Layers software:
An afocal image was taken through a 16.8mm orthoscopic eyepiece with a hend held Fujifilm F-450 compact camera. Both images were colourised to represent the colour of the H-alpha light being used:
This image captured solar disk structure as well as the prominences.
Steve Wainwright
Thursday, April 15, 2010
Solar Prominences back to normal
There was little activity on the solar disk with just a few small prominences on the limb.
A hand-held afocal image was taken with a Fujifilm F-450 compact camera in B/W mode. The image has been colourised after levels ajustments and unsharp masking in The Gimp to represent the red of H-alpha:
Filaments and surface super granulation can be seen in this image proving that using simple equipment can be worthwhile.
Steve Wainwright
Tuesday, April 13, 2010
Detached prominence
Enormous, ephemeral eruptive prominence
Within an hour it had largely dissipated.
I used a DMK21 camera fitted with a short nosepiece and the lens assembly from a Coronado Cemax x2 Barlow and a H-alpha PST solar scope:
Eruptive prominence
Here is the same image colourised to represent the wavelength of light being observed:
Separate exposures to show the prominence and the solar disk were combined using Andrew Sprott's Solar Layers software.
A simple compact Fujifilm F-450 compact camera in B/W mode was able to capture the prominence with an afocal shot through a 15mm eyepiece:
A virtual occultation disk has been placed over the Sun in the right hand image to facilitate viewing the prominence which is fainter than the disk of the Sun.
Steve Wainwright
Monday, April 12, 2010
Fine Solar Prominence and Saturn
The image comprised 3000 frames exposed for the prominence stacked in Registax and 2000 frames exposed to show the disk, stacked in registax and combined to form a single image with Andrew Sprott's Solar Layers software.
This is the same prominence but the camera used was a ToUCam Pro webcam:
In both images filaments can be seen snaking towards the limb where they become prominences.
In the evening I used the DMK21 camera with a 2.5x Barlow and a Skymax127 Maksutov to capture 10,000 frames that were then stacked in Registax to produce this image:
Steve Wainwright
Keith Davies captured the same prominences at two different image scales with his H-alpha PST and his DMK31
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