Globular Cluster ... Messier 3
(Click on Picture for larger view)


Added April 27, 2019 ...
Globular Cluster in Canes Venatici ... also known as Messier 3 This beautiful cluster contains a bit more than 500,000 stars and is about 33,900 light-years away. The age of the majority of stars is roughly 8 billion years old, as compared to 4.6 billion years of our sun. I took this image on the night of Saturday, April 27, 2019, with the Celestron 11" telescope at f/7. This is a one-hour exposure. This cluster is located to the upper right of the bright yellow star Arcturus and it is high overhead around midnight in late April.


The Techy Stuff ... For those who want to know ...
Telescope: Celestron 11" Edge HD at f/7
0.7x Reducer lens
Mount: Celestron CGX
Mount settings: Celestron PWI V2.1.25
Polar Alignment: QHY Pole Master
Guiding: Orion StarShoot AutoGuider Pro & 60mm Scope
Guiding Software: PHD2 ... (RMS Error: 0.31 px)
Camera: Canon T7i
Settings: 120 sec exposure at ISO 1600
Filter: None
Total sub-frames: 30
30 Dark & Bias frames
Backyard EOS 3.1
Stacked in Deep Sky Stacker at 2X Drizzle
Post processing in PixInsight & Photoshop CC
Bortle Light Pollution zone: 4.5 (Barely can see the Milky Way)
Sky Condition: 10 [scale of 0 (cloudy) to 10 (clear)]
No Lunar interference
Temperature: 63F
Location: My Backyard, Savannah, GA




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