I've got a Nikon D7200 that I use for both daytime and astro, has the same sensor as the D5300-5600. All Nikons have a Bulb mode, assuming all Canons do as well.
http://www.astrobin.com/294419/B/
http://www.astrobin.com/304742/
http://www.astrobin.com/304521/
http://www.astrobin.com/301679/
http://www.astrobin.com/301645/
http://www.astrobin.com/297031/
All shot with the D7200. It is a very clean and low noise sensor. Has near enough to zero dark current when shot at 0C° and through testing I've done there is no reason to ever go over ISO800 as it just gets noisier after that. I'll usually shoot at ISO200-400.