Swansea Astronomical Society Blog

Saturday, September 15, 2012

Jupiter

A DBK21AS camera, fitted with a 2.5x Barlow was attached to a 120mm ED refractor and Jupiter was imaged:

Keith Davies

posted by astroimager # 11:19 AM 0 Comments

Friday, September 14, 2012

AR1571 and two prominences in H-alpha light

A DMK21AS camera fitted with a x2 Cemax Barlow was placed in a Solarmax ll 60 BF15 H-alpha scope. The region of AR1571 was imaged:

Two regions of the solar disk with prominences on the limb were imaged at two exposures; one exposure for the disk and a longer exposure for the prominences. The two images for each region were then combined:

Steve Wainwright

posted by astroimager # 6:23 PM 0 Comments

Wednesday, September 12, 2012

H-alpha and Ca K-line images of the Sun

A DMK21AS camera was placed at the prime focus of a Solarmax ll 60 BF15, H-alpha solar scope and also a Ca K-line PST solar scope. For each wavelength, four overlapping regions were imaged and stitched together to form full disk images. Click on the images to get a larger view:

H-alpha

Ca K-line

Both images were merged into a single image to show the structures revealed by each part of the spectrum used.

Combined H-alpha and Ca K-line images

Steve Wainwright

posted by astroimager # 12:48 AM 0 Comments

Tuesday, September 11, 2012

The Moon imaged in daylight with no visible photons

A DMK21AS camera, fitted with a Schuler IR Pass Filter passing only radiation of wavelengths 850nm and longer was placed at the prime focus of an f/5, 150mm refractor. Four overlapping AVIs were captured of the 22% waning crescent Moon and processed in Registax. The 4 resulting images were combined to produce the final image. Click on the image to get a larger view:

Human vision extends from about 390 to 750nm. Immediately above 750nm is the infra red and the filter used here blocks out all light below 850nm (i.e. all visible light). However about 50% of solar radiation is in the infra red, so in this region it is still bright. The sky appears dark in the infra red because little IR is emitted by the sky.

Steve Wainwright

posted by astroimager # 2:37 PM 0 Comments

Sunday, September 9, 2012

Jupiter and Deep sky

An Atik 314E camera was placed at the prime focus of an 80mm apochromatic refracor and 10 x 30s exposures and 10 x 1 min exposures were captured of M31. The images were stacked in Deep Sky Stacker and post processed in Photoshop:

4 x 5 minute exposures and 4 x 2min exposures were made of M81. The images were stacked in Deep Sky Stacker and post processed in Photoshop:

A DBK21 camera fitted with a 2.5x Barlow was attached to an ED, 120mm refractor and Jupiter was imaged:

Keith Davies

posted by astroimager # 7:43 PM 0 Comments

50% waning Moon

A DFK21AS camera was placed at the prime focus of an f/5, 150mm Newtonian. AVIs of three overlapping areas were captured and processed in Registax. The resulting images were combined into a single final image. Click on the image to get a larger view:

This is the rare side of the Moon, more often seen in daylight.

Steve Wainwright

posted by astroimager # 5:14 PM 0 Comments

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