Hemisphere:  Northern  ·  Contains:  Crescent Nebula  ·  Crescent nebula  ·  NGC 6888  ·  NGC6888  ·  Sh2-105
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Crescent Nebula (NGC6888) close up in Hα/SII/OIII+rgb, 



    
        

            Jose Carballada
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Crescent Nebula (NGC6888) close up in Hα/SII/OIII+rgb

Imaging telescopes or lenses: Teleskop Service TS Photoline 107mm f/6.5 Super-Apo  ·  Altair Astro RC250-TT 10" RC Truss Tube

Imaging cameras: ZWO ASI183MM-Cool  ·  ZWO ASI1600MM-Cool

Mounts: Skywatcher EQ6R Pro  ·  Mesu 200 Mk2

Guiding telescopes or lenses: Celestron OAG Deluxe  ·  Teleskop Service TSOAG9 Off-Axis Guider

Guiding cameras: ZWO ASI290 Mini  ·  ZWO ASI174 Mini

Focal reducers: Riccardi Reducer/Flattener 0.75x  ·  Telescope-Service TS 2" Flattener

Software: Pleiades Astrophoto PixInsight  ·  Seqence Generator Pro

Filters: Astrodon O-III 36mm - 5nm  ·  Astrodon S-II 36mm - 5nm  ·  Astrodon R Gen.2 E-series 36mm  ·  Astrodon G Gen.2 E-series 36mm  ·  Astrodon B Gen.2 E-series 36mm  ·  Astrodon HA 36mm - 5nm  ·  Astrodon L Gen.2 E-series 36mm

Accessory: ZWO EFW  ·  MoonLite NiteCrawler WR30  ·  TALON6 R.O.R  ·  MoonLite CSL 2.5" Focuser with High Res Stepper Motor


Dates:June 21, 2020June 22, 2020June 23, 2020June 29, 2020July 18, 2020

Frames:
Astrodon B Gen.2 E-series 36mm: 50x120" (gain: 75.00) -20C bin 1x1
Astrodon G Gen.2 E-series 36mm: 50x120" (gain: 75.00) -20C bin 1x1
Astrodon HA 36mm - 5nm: 209x600" (gain: 200.00) -20C bin 1x1
Astrodon O-III 36mm - 5nm: 105x600" (gain: 183.00) -15C bin 1x1
Astrodon R Gen.2 E-series 36mm: 50x120" (gain: 75.00) -20C bin 1x1
Astrodon S-II 36mm - 5nm: 106x600" (gain: 183.00) -15C bin 1x1

Integration: 75.0 hours

Avg. Moon age: 7.92 days

Avg. Moon phase: 15.25%


Astrometry.net job: 3726162

RA center: 20h 12' 6"

DEC center: +38° 21' 0"

Pixel scale: 1.007 arcsec/pixel

Orientation: -89.431 degrees

Field radius: 0.408 degrees


Resolution: 2328x1760

Locations: AAS Montsec, Àger, Lleida, Spain

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

Crescent Nebula revisited three years later with better equipment, better skies and some more skills.

It's the first presented image after this long period, in part due the COVID in part because the long integration time that I wanted and how short are these summer nights.

It was eleven nights with two rigs resulting on 75 hours of integration time. My longest integration time so far.

Comments

Author

Carballada
Jose Carballada
License: Attribution-NonCommercial-ShareAlike Creative Commons
3806
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Revisions

  • Crescent Nebula (NGC6888) close up in Hα/SII/OIII+rgb, 



    
        

            Jose Carballada
    Original
  • Crescent Nebula (NGC6888) close up in Hα/SII/OIII+rgb, 



    
        

            Jose Carballada
    B
  • Final
    Crescent Nebula (NGC6888) close up in Hα/SII/OIII+rgb, 



    
        

            Jose Carballada
    C

B

Description: little change on brightness

C

Description: brightness again

Sky plot

Sky plot

Histogram

Crescent Nebula (NGC6888) close up in Hα/SII/OIII+rgb, 



    
        

            Jose Carballada