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Cederblad 51 & Barnard 32 Region in Lambda Orionis, 


            Min Xie
Cederblad 51 & Barnard 32 Region in Lambda Orionis
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Cederblad 51 & Barnard 32 Region in Lambda Orionis

Technical card

Imaging telescopes or lenses: Takahashi FSQ-106EDX III  ·  Takahashi TOA-130NS

Imaging cameras: ZWO ASI6200mm-Pro

Mounts: Astro-Physics AP1100GTO-CP3

Guiding cameras: ZWO ASI174mm-Mini

Software: Starkeeper.it Voyager Custom Array  ·  StarNet++  ·  Adobe Photoshop 2020  ·  Astro Pixel Processor  ·  PixInsight 1.8 Ripley

Filters: Chroma 50mm Blue  ·  Chroma 50mm Green  ·  Chroma 50mm Red  ·  Chroma 50mm Luminance  ·  Chroma 50mm Ha 5nm

Accessory: ZWO EFW 2" 7 Position  ·  ADM Accessories TGAD (Tandem Guiding Aiming Device)  ·  虫子 WormCover & WormFlatPanel  ·  ADM Accessories SBS Supporting System  ·  MoonLite NiteCrawler WR35 Focuser  ·  Kingdel NC860 (i7-8550U)

Dates:Nov. 19, 2020Nov. 20, 2020Nov. 21, 2020Nov. 27, 2020Nov. 28, 2020Nov. 29, 2020

Chroma 50mm Blue: 63x180" (gain: 0.00) -10C bin 1x1
Chroma 50mm Green: 58x180" (gain: 0.00) -10C bin 1x1
Chroma 50mm Ha 5nm: 118x600" (gain: 100.00) -10C bin 1x1
Chroma 50mm Luminance: 276x120" (gain: 0.00) -10C bin 1x1
Chroma 50mm Red: 73x180" (gain: 0.00) -10C bin 1x1

Integration: 38.6 hours

Darks: ~20

Flats: ~20

Bias: ~40

Avg. Moon age: 9.39 days

Avg. Moon phase: 64.59%

Bortle Dark-Sky Scale: 2.00

Mean SQM: 21.99

Temperature: 10.67

Basic astrometry details

Astrometry.net job: 4129220

RA center: 5h 31' 31"

DEC center: +12° 18' 32"

Pixel scale: 1.771 arcsec/pixel

Orientation: 155.128 degrees

Field radius: 1.135 degrees

Resolution: 2560x3840

Locations: Dark Sky New Mexico, Animas, New Mexico, United States

Data source: Own remote observatory

Remote source: Dark Sky New Mexico


In SH2-264 cloud, there are two targets sitting on my target list since the winter of 2019. The whole Lambda Orionis is a fantastic region - strong H-II emission, rich dust clouds, and, the best part is the blue reflection nebula Ced 51. I don't think I gave a fair amount of broadband data to Barnard 35. For Barnard 32, I did stay there for a while.

This is my second "full scale" broadband+narrowband blending experiment. The target is: Details of the emission clouds and the color of the broadband regions. There are lots of unknowns before I started the processing. One thing that got me immediately is the luminance level change after blending Ha into Lum for the synthetic luminance master. Tried different ways to balance it without much success. Till the end of the processing, I still don't have a systematic way to do this methodically in PixInsight. Quite a struggle with color mask and curve transformation, then I quit and went back to the wonderful Photoshop Hue/Saturation adjustment layer. 😊

Another debate is about the presentation of the final image. I am still not decided. One way is to use narrowband image style stars to maximize the presentation of the beautiful clouds; and the other way is to go with more "LRGB" style stars. Maybe I've been with backyard narrowband imaging for too long. I am more biased to the pin-point stars with less density.

Some brief description of the different versions:

Version A - LHa/RHa/G/B blending with narrowband style RGB stars.
Version B - Typical LRGB blending with TVGDenoise.
Version C - Starless Version A blending with LRGB version, EZ Star Reduction with MT.

All there use the FOV of the excellent Takahashi TOA-130NS scope. The resolution power is wonderful. Some details of the H-II streaks well captured under the dust cloud. There is one part I do love Version C - blending with the original LRGB data preserved many small galaxies in the image.

Hope you folks like it. Happy New Year 2021!



Min Xie


    Cederblad 51 & Barnard 32 Region in Lambda Orionis, 


            Min Xie
    Cederblad 51 & Barnard 32 Region in Lambda Orionis, 


            Min Xie
  • Final
    Cederblad 51 & Barnard 32 Region in Lambda Orionis, 


            Min Xie
    Cederblad 51 & Barnard 32 Region in Lambda Orionis, 


            Min Xie


Description:Traditional LRGB Blend...


Description:NB-LRGB Blend with LRGB Stars...



Sky plot

Sky plot


Cederblad 51 & Barnard 32 Region in Lambda Orionis, 


            Min Xie