Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  PK110+01.1  ·  Sh2-155  ·  VdB155
SH2-155 Cave nebula HOO, Andreas Zeinert
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SH2-155 Cave nebula HOO

SH2-155 Cave nebula HOO, Andreas Zeinert
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SH2-155 Cave nebula HOO

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Description

This nebula is not very brilliant except for the core. It is also called Caldwell 9. OIII is extremely weak. I had 27 OIII 10 or 12 min subs and 30 Ha subs with more than 10 hours, a personal record. Not too much ! With the reducer my Takahashi FSQ85 was at F/3.86. You need a fast instrument to get the outer regions.

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  • SH2-155 Cave nebula HOO, Andreas Zeinert
    Original
  • SH2-155 Cave nebula HOO, Andreas Zeinert
    B
  • Final
    SH2-155 Cave nebula HOO, Andreas Zeinert
    D

B

Description: A bit more colour saturation

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SH2-155 Cave nebula HOO, Andreas Zeinert