Contains: NGC 3628, M 66, NGC 3627, M 65, NGC 3623, NGC 3593, The star 73Leo
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M65, M66, and NGC 3628 Leo's Trio

Technical card

Resolution: 6016x4016

Dates: March 12, 2018

Frames: 20x300" ISO1600

Integration: 1.7 hours

Darks: ~10

Bias: ~10

Avg. Moon age: 24.82 days

Avg. Moon phase: 23.05% job: 1963251

RA center: 169.578 degrees

DEC center: 13.040 degrees

Pixel scale: 1.879 arcsec/pixel

Orientation: 65.646 degrees

Field radius: 1.888 degrees


I decided before I went outside that I would try and image Leo's Trio. I set up all my gear before dark because I wanted to begin imaging as soon as it was dark enough to polar align my mount.
I took three test images trying to decide on an iso setting and exposure. On the third test image
Windows 10 decides to take control of my computer to do an update. No matter what I did I couldn't regain control of my computer. It took 2 1/2 hours to do the updating and my computer
restarted at least 5 times. This has happened at least 4 times before when I went to turn off my
computer at the end of an imaging session. Knowing my temper it's a wonder that my computer
didn't wind up thrown against my shed wall. We pay a lot of our hard earned money for these
computers but we don't own them. Microsoft owns them. There has been a lot of controversy
over this. Windows 10 was designed to be a "mandatory" updating operating system. Anyway
enough about that. When I could finally begin imaging at 10:30pm there was moisture everywhere. After every image I had to take a hair dryer and dry the main objective of my imaging scope and the objective of my guiding scope. And if that wasn't enough I also had tracking problems or at least I think it was a tracking problem. With all of that said please forgive
my ranting and enjoy my most recent image of Leo's Trio.




Sky plot

Sky plot


M65,  M66,  and NGC 3628  Leo's Trio,