Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)
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Sh2 187, akulapanam
Sh2 187
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Sh2 187

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Sh2 187, akulapanam
Sh2 187
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Sh2 187

Equipment

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Acquisition details

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Description

By far the toughest target I have tried to take.

Dark nebula tentacles in Red zone skies is tough but even tougher when your are imaging at .45". .45" is also far below the sampling for my average seeing which was 3.43" for LUM during the shoot. For that reason I elected to downsample my final image to help reduce noise.

I also completely underexposed Ha and found that it didn't add anything to my Lum as a result. As a result I only used Ha to integrate with R.

Comments

Revisions

  • Sh2 187, akulapanam
    Original
  • Sh2 187, akulapanam
    B
  • Sh2 187, akulapanam
    C
  • Sh2 187, akulapanam
    D
  • Final
    Sh2 187, akulapanam
    E

B

Description: Mono

Uploaded: ...

C

Description: Uploaded to show what the new Arcsinh stretch can do in PixInsight for stars

Uploaded: ...

D

Description: Typical top quartile of Lum frame at full resolution with just a screen stretch. 2.85" FWHM and .29 eccentricity both before strech

Uploaded: ...

Sky plot

Sky plot

Histogram

Sh2 187, akulapanam