Archive for the ‘Nearby Stars’ Category

Sirius

Posted by Paulo Cacella on 8th February 2016 in Images, Nearby Stars, Recent Posts, Stars

First image with the 20 in (Sirius)

Posted by Paulo Cacella on 9th January 2014 in Instruments, Nearby Stars, Recent Posts
This was the first 10 seconds exposure of Sirius using a T3i and the 20in scope. There is some coma as I´ve not yet used the coma corrector and I need to improve the mirror cell to allow a better coma correction. Also the telescope is open and I had a quarter moon causing reflections.

Scale is 0.4 arcsec/pixel and mag limit something like 16.

Sirius 10sec