Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
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Elephant's Trunk - Close Up - CDK12.5, 



    
        

            Rouzbeh
Elephant's Trunk - Close Up - CDK12.5
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Elephant's Trunk - Close Up - CDK12.5

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Elephant's Trunk - Close Up - CDK12.5, 



    
        

            Rouzbeh
Elephant's Trunk - Close Up - CDK12.5
Powered byPixInsight

Elephant's Trunk - Close Up - CDK12.5

Technical card

Imaging telescopes or lenses: Planewave CDK 12.5

Imaging cameras: QHYCCD 268M

Mounts: Astro-Physics AP1100 GTO CP4

Focal reducers: Planewave Instruments 0.66x Reducer

Software: NINA - Nighttime Imaging ‘N’ Astronomy  ·  PixInsight 1.8.6 Ripley Pisinsight 1.8

Filters: Chroma 3nm OIII  ·  Chroma 3nm Sii  ·  Chroma 3nm H⍺


Dates:Sept. 15, 2021

Frames:
Chroma 3nm H⍺: 52x300" (4h 20')
Chroma 3nm OIII: 45x300" (3h 45')
Chroma 3nm Sii: 40x300" (3h 20')

Integration: 11h 25'

Avg. Moon age: 9.14 days

Avg. Moon phase: 68.24%


Basic astrometry details

Astrometry.net job: 5011772

RA center: 21h35m20s.9

DEC center: +57°2924

Pixel scale: 0.834 arcsec/pixel

Orientation: 269.242 degrees

Field radius: 0.479 degrees


Resolution: 2297x3439

Data source: Backyard

Description

The Elephant's Trunk Nebula is interstellar gas and dust about 2,400 light years away from Earth.
The bright rim is the surface of the dense cloud that is being illuminated and ionized by a very bright massive star. The entire region is ionized by the massive star, except for dense globules that can protect themselves from the star's harsh ultraviolet rays.

The combined action of the light from the massive star ionizing and compressing the rim of the cloud, and the wind from the young stars shifting gas from the center outward lead to very high compression in the Elephant's Trunk Nebula. This pressure has triggered the current generation of protostars (young stars being born).

Equipment:
Taken with the CDK12.5 and the PW 0.66 reducer from our backyard over 3 nights through semi-cloudy skies.

The AP1100GTO performed admirably, tracking the target unguided  through the clouds and allowing data to be captured throughout the night. The subs(exposures) blocked by clouds were then deleted.

The QHY268m  with its very low Read Noise and very high quantum efficiency is a perfect candidate for the task.

Comments

Revisions

  • Elephant's Trunk - Close Up - CDK12.5, 



    
        

            Rouzbeh
    Original
  • Elephant's Trunk - Close Up - CDK12.5, 



    
        

            Rouzbeh
    C
  • Final
    Elephant's Trunk - Close Up - CDK12.5, 



    
        

            Rouzbeh
    E

C

Description: Brighter Version

Uploaded: ...

E

Description: I believe this one is better processed.

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Sky plot

Sky plot

Histogram

Elephant's Trunk - Close Up - CDK12.5, 



    
        

            Rouzbeh