M45: The Pleiades or Seven Sisters

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The Pleiades, or Seven Sisters, is a famous open star cluster visible to the naked eye in the winter sky. What is not visible to the naked eye are the blueish wisps of nebulosity surrounding the larger central stars. The blue color is typical of a reflection nebula, which is lit up by the light from the nearby stars, and is not formed by glowing gas as in an emission nebula. This image was an attempt to see what I could capture with a very simple setup from my driveway in the light-polluted suburbs of Maryland. A simple equatorial mount with a small refractor, 2-minute exposures with a DSLR and no filters (OK, on a moonless night). I wasn't expecting to get much of the blue nebulosity, but I was quite pleased with how much showed up. Total exposure time was a bit over three hours.

 Optics:Stellarvue SV70T w/ reducer 
Camera:astro-modified Canon 5Ti 
Mount:iOptron CEM25EC, unguided 
Exposure info:99 x 120 sec iso400 
Filters used:none 
date:December 2016