Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  Sh2-155  ·  VdB155
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Cave Nebula (Sh2-155, VdB155), 



    
        

            Gary Lopez
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Cave Nebula (Sh2-155, VdB155)

Imaging telescopes or lenses: William Optics GT71 71mm f/5.9 Apo Refractor  ·  William Optics FLT 132 Triplet APO f/7

Imaging cameras: ZWO ASI1600MM Cooled PRO

Mounts: Orion Atlas EQ-G

Guiding telescopes or lenses: Orion 50mm Guide Scope with helical focusing

Guiding cameras: Lacerta M-Gen II Autoguider

Focal reducers: William Optics 0.8X Field Flattener  ·  William Optics Flattener 68III

Software: Adobe Lightroom CC  ·  Photoshop CC  ·  Main Sequence Software Sequence Generator Pro, v3.0  ·  Pleaides PixInsight Core 1.8

Filters: Astrodon R Gen 2 E-series 31mm  ·  Astrodon G Gen 2 E-series 31mm  ·  Astrodon B Gen 2 E-series 31mm  ·  Astrodon OIII 3nm-31mm  ·  Astrodon SII 3nm-31mm  ·  Astrodon Ha 3nm-31mm


Dates:Sept. 27, 2020Sept. 30, 2020Oct. 4, 2020Oct. 16, 2020Oct. 17, 2020Oct. 21, 2020Oct. 29, 2020Oct. 30, 2020Jan. 15, 2021

Frames:
Astrodon B Gen 2 E-series 31mm: 30x60" (gain: 139.00) -139C bin 1x1
Astrodon G Gen 2 E-series 31mm: 30x60" (gain: 139.00) -15C bin 1x1
Astrodon Ha 3nm-31mm: 233x180" (gain: 139.00) -15C bin 1x1
Astrodon Ha 3nm-31mm: 232x180" (gain: 200.00) -15C bin 1x1
Astrodon OIII 3nm-31mm: 110x180" (gain: 139.00) -15C bin 1x1
Astrodon OIII 3nm-31mm: 37x180" (gain: 200.00) -15C bin 1x1
Astrodon R Gen 2 E-series 31mm: 30x60" (gain: 139.00) -15C bin 1x1
Astrodon SII 3nm-31mm: 87x180" (gain: 139.00) bin 1x1
Astrodon SII 3nm-31mm: 46x180" (gain: 200.00) -15C bin 1x1

Integration: 38.8 hours

Darks: ~30

Bias: ~50

Avg. Moon age: 11.73 days

Avg. Moon phase: 56.15%

Bortle Dark-Sky Scale: 4.00


Astrometry.net job: 4182540

RA center: 22h 56' 17"

DEC center: +62° 28' 41"

Pixel scale: 0.862 arcsec/pixel

Orientation: -74.373 degrees

Field radius: 0.644 degrees


Resolution: 4292x3245

Locations: Monterey Pines Observatory, Monterey, California, United States

Data source: Backyard

Description

When you have 38.8 hours of really good data, I think you are obligated to process them at least a couple of times. Those 38.8 hours were collected in a five week period last September and October, and included both wide-field (using a WO GT71, FL 336mm) and narrow-field (using a WO FLT132, FL925) telescopes. In assembling these data, the narrow-field FOV determined the framing. I posted a SHO (using traditional Hubble color assignments) about three months ago (https://www.astrobin.com/83ihov/?nc=user). In this current rendition, I used my home grown Pixel Math narrowband formula for simulating a “natural” color palette. I have included the original SHO rendition as Version B for comparison.

Comments

Revisions

  • Cave Nebula (Sh2-155, VdB155), 



    
        

            Gary Lopez
    Original
  • Cave Nebula (Sh2-155, VdB155), 



    
        

            Gary Lopez
    B
  • Final
    Cave Nebula (Sh2-155, VdB155), 



    
        

            Gary Lopez
    C

B

Description: SHO rendition

Uploaded: ...

C

Description: Minor clean up

Uploaded: ...

Sky plot

Sky plot

Histogram

Cave Nebula (Sh2-155, VdB155), 



    
        

            Gary Lopez