Archive for Nebulosity 2

Lyra & Hercules constellations

Posted in Astrophotography with tags , , , , , , , , , , , , on 2009/07/23 by computerphysicslab

Last night Lyra and Hercules were located near the zenith of my suburban sky, so I could make a series of 90 shots with 10 seconds of exposure each one. My equipment was the DSLR camera Canon EOS 450 (Rebel XTi). This image sequence is equivalent to a 15 minutes long single shot. After adding them with the shift-and-add technique, and substracting a dark frame (via Photoshop) that includes light pollution I got a final picture. I have aligned (using Nebulosity 2 software) the Stellarium map of the area and created an animated gif that switchs from the photo to the map continuously. It seems every star is located correctly where it should be ;-)

Globular clusters M13 and M92 are there in the photo like 2 stars.

Lyra-Hercules-photo-map-small

Lyra-Hercules-photo-map

From a light polluted city

Posted in Astrophotography with tags , , , , , , , , on 2009/07/19 by computerphysicslab

This image was taken in the center of a light polluted city with almost 1 million inhabitants. Using a dark frame of the polluted sky I could catch the Milky Way. Obviously it was impossible to observe it with naked eye.

The image is the result of adding 20 subframes of 15 seconds of exposure each one at ISO 1600. After applying a barrel distortion filter to compensate lens distortion the images become integrable. Using Nebulosity 2 software I could compensate the sideral motion of the sky.

The quality of the image is very low. The point here is not quality but the successful of avoiding light pollution in a widefield Milky Way shot. The area corresponds to the border of Lyra constellation towards Aquila constellation.

without-light-pollution

Waxing Gibbous Moon

Posted in Astrophotography with tags , , , , , , , , , , , on 2009/04/08 by computerphysicslab

Yesterday’s Moon in phase waxing gibbous as seen through the Vixen 12×80 binocular, here it is. Registax 5 stacked 55 individual frames of 8 Mpx each. Nebulosity 2 was used to compensate the sideral movement and perform the de-rotation. Sharpening with Paint Shop Pro.

Waxing Gibbous Moon

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