Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  Andromeda Galaxy  ·  M 110  ·  M 31  ·  M 32  ·  NGC 205  ·  NGC 206  ·  NGC 221  ·  NGC 224
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Andromeda - Light pollution comparison - 1 x 30s in Bortle 4 compared to 10 x 30s from Bortle 9 / White zone, Jason R Wait
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Andromeda - Light pollution comparison - 1 x 30s in Bortle 4 compared to 10 x 30s from Bortle 9 / White zone

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Andromeda - Light pollution comparison - 1 x 30s in Bortle 4 compared to 10 x 30s from Bortle 9 / White zone, Jason R Wait
Powered byPixInsight

Andromeda - Light pollution comparison - 1 x 30s in Bortle 4 compared to 10 x 30s from Bortle 9 / White zone

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Description

Nikon D750, Orion XT8G, Tele Vue Paracorr

While working on adjusting my imaging train to resolve spacing and tilt issues, I decided to capture Andromeda from within the Bortle 9 / white zone where I live to produce this comparison. Both images have poor star shape, but the point is to demonstrate the loss of information due to light pollution. Both images are uncalibrated and processed in PixInsight, and the Bortle 9 frames were integrated in PixInsight.

1 single frame x 30s at 3200 ISO from Bortle 4 skies

10 x 30s at 3200 ISO from Bortle 9 skies / white zone (Vancouver, Canada)

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Sky plot

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Andromeda - Light pollution comparison - 1 x 30s in Bortle 4 compared to 10 x 30s from Bortle 9 / White zone, Jason R Wait