Date: 09/28/2014
Location: Lake San Antonio, CA
Condition: excellent transparency, excellent seeing, forst
Exposure: 19×15′, bias/dark/flat calibrated
Imaging: AT111EDT+STF8300C on CGEM
Guiding: AT72ED+SSAG
Software: Pixinsight
The polar alignment was off a bit as I made some mistakes, so there isĀ visible field rotation in the final image.
Date: 11/24/2014
Location: Lake San Antonio, CA
Condition: excellent transparency, excellent seeing, forst
Exposure: 19×15′, bias/dark/flat calibrated
Imaging: AT111EDT+STF8300C on CGEM
Guiding: AT72ED+SSAG
Software: Pixinsight
I could only capture R and G subsĀ on 2/19 at Henry Coe, where the marine layer covered all directions and sky was completely dark, so I had to head to MonteBello OSP on 2/23 despite of windy condition and poor seeing to get B subs. The B subs have much brighter background (due to light pollution), larger star size (due to poor seeing) and noticeable field rotation (due to some tracking issue).
Overall result is much better than the same object I did last year with STF8300C, lots of details were brought out by L subs, esp M66 core region.
Data & Location:
02/14/2015, Henry Coe State Park, Morgan Hill, CA. Clear, dry, excellent transparency and seeing.
02/19/2015, Henry Coe State Park, Morgan Hill, CA. Clear, heavy dew & cold turned to dry & warm, excellent transparency and very good seeing. Completely dark at after sunset as marine layer covered all directions.
02/23/2015, MonteBello OPS, CA. Clear, dry & cold, windy, Very good transparency and slightly below average seeing.
Exposure:
L – 17×15′ Bin1x1 (taken on 02/14/2015), R – 9×15′ Bin1x1 (taken on 02/19/2015), G – 8×15′ Bin1x1 (take on 02/19/2015), B – 6×15′ Bin1x1 (taken on 02/23/2015). Bias/Dark/Flat calibrated
Equipment:
AT111EDT + CGEM + STF8300M + Baader LRGB
AT72ED + Orion SSAG
Software:
Nebulosity + PHD2 + Pixinsight