Swansea Astronomical Society Blog

Saturday, April 17, 2010

 

Crescent Moon

In the bright evening sky I used a DMK21 with a red filter to image the Moon through a 70mm F/10 refractor. The Moon was imaged in three sections and 2000 frames wera captured and stacked for each section. The three images of the crescent Moon were then merged using Jon Grove's iMerge software:

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

I took a few AVIs of Saturn around 11pm last night.
 
It was taken through my 11" Celestron, DBK 21 camera and a 2.5x barlow.
 
Keith Davies

 

Saturn and Sombrero Galaxy

Wayne Jones and I teamed up at Fairwood last night to do some imaging with his Mintron accumulating camera and my Celestron 8SE scope. We got the above results after stacking with Registax and de-noising using GIMP selective Gaussain blur. Saturn was taken with a 2x barlow. Quite encouraging results for beginning imagers like ourselves!

 

Venus and the crescent Moon

Last night at dusk provided nice views of the crescent Moon with Venus below it.
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

A DMK21 camera was used with a 3x Meade Barlow lens and a H-alpha PST solar scope to capture AVIs exposed for the prominence and the disk separately.
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

Using a DMK21 camera fitted with a short nosepiece and the lens assembly from a Cemax 2x Barlow, a PST H-alpha solar scope was used to obtain these images. They have been colourised to represent the wavelength of light being used:



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

After speaking to Steve this morning I was able to image what looks like a detached prominence. Both shots have been sent to Spaceweather.
 
They were taken through my PST, DMK31 (Mono) camera, a 2x then 3x barlow. Seeing conditions were quite poor with thin hazy cloud.
Keith Davies

 

Enormous, ephemeral eruptive prominence

Between 9-35 and 9-44am BST I imaged an enormous eruptive prominence that was about a quarter of the diameter of the Sun in size.
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

I used a x2 Barlow with the DMK21 camera and a H-alpha PST solar scope to capture this image of a hedgerow prominence.

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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