Re: Dolphin Head Nebula (SH2-308) - 15 degrees above the horizon


Cheng-Yang Tan
 

Very challenging to get this excellent photo.


Sent from Yahoo Mail for iPad

On Tuesday, March 23, 2021, 5:08 PM, jypeng@... wrote:

Hello
I like to share one of the difficult targets I acquired recently.
This Mach2GTO was tracking (20 minutes guiding) my target very well just 15 degrees above the horizon. No modeling this time due to my model is all above 25 degrees above. 
Excellent mount, Great job, AP!
Thanks,
Jian Yuan Peng
Astrobin: https://www.astrobin.com/7cldi1/
 
Technical details:
Telescope: TEC 160FL + TEC FRC 0.9x
Mount: Astro-Physics Mach 2 GTO
Imaging cameras:ZWO ASI6200MM
Software: PHD2, PixInsight, Lightroom 6.4, Sequence Generator Pro, Photoshop CS6
Location: Palo Alto, California, USA
Total Integration: 26.8 Hours
PhotometricColorCalibration data(before crop):
Resolution ............... 0.392 arcsec/px
Rotation ................. -113.083 deg
Observation start time ... 2021-02-22 07:02:07 UTC
Observation end time ..... 2021-03-13 05:14:25 UTC
Focal distance ........... 989.28 mm
Pixel size ............... 1.88 um
Field of view ............ 1d 11' 25.1" x 1d 8' 12.7"
Image center ............. RA:  6 54 15.613  Dec: -23 55 29.32
 
Filters: Astrodon 50mm Unmounted LRGB Gen2 E-Series Filter Sets
Astrodon 50mm Unmounted 3nm Narrowband Ha, SII, OIII filters
Blue   35x60"   35 Minutes Bin1x1
Green  43x60"   43 Minutes Bin1x1
Red    36x60"   36 Minutes Bin1x1
Ha     12x900" 22x1200"   10.3 Hours Bin1x1
OIII   9x900" 37*1200"    14.5 Hours Bin1x1
 

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