Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  B33  ·  Flame Nebula  ·  Horsehead nebula  ·  IC 434  ·  NGC 2023  ·  Orion B  ·  Sh2-277
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ic434    RGB test image, binned 3x3, Michael Sherick
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ic434 RGB test image, binned 3x3

Getting plate-solving status, please wait...
ic434    RGB test image, binned 3x3, Michael Sherick
Powered byPixInsight

ic434 RGB test image, binned 3x3

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Description

This RGB image of the HorseHead Nebula was one of the early test images for the 24" RC. At that time, I was having some guiding issues which were caused by excessive DEC backlash. I have since resolved much of the backlash issue. Using PHD-2 "Predictive Guiding" has been a big help in obtaining accurate guiding, which now is typically < 0.5 arcsec total RMS guide error.

The Periodic Error in RA has now been reduced to <0.8 arcsec using TheSkyX. Even with a 50 point TPoint model, centering accuracy has shown to be excellent.

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ic434    RGB test image, binned 3x3, Michael Sherick