The Heart and Soul in Ha just above the brightest streetlamp around my backyard (Sebastian B.)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Double cluster · IC 1795 · IC 1805 · IC 1848 · NGC 1027 · NGC 869 · NGC 884 · NGC 896 · Part of the constellation Camelopardalis (Cam) · Part of the constellation Perseus (Per) · The star 48Cas · The star 50Cas · The star γCam · The star γPer · The star εCas · The star ηPer · The star ιCas · The star ιPer · The star τPer · The star φPer

The Heart and Soul in Ha just above the brightest streetlamp around my backyard, Sebastian B.

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The Heart and Soul in Ha just above the brightest streetlamp around my backyard

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The Heart and Soul in Ha just above the brightest streetlamp around my backyard

Today, I thought about a little experiment. I'm thinking of getting a dedicated astro camera (ZWO ASI) for better SNR (much less dark current noise than uncooled DSLRs) but I wanted to know how much of an impact light pollution (photon noise) has. And seeing this was shocking. Photons create a major part of noise in long exposures but... just WOW. The red (gray) channel shows this even better. There was not much processing involved, just stretching (curves&levels).

You can see the roof of a house in the right corner, the street, respectively the streetlamp (I think it's a Hg one) is right between this house and my backyard. On the right there is A LOT less noise/ a way better SNR. The DSO was literally one meter above the lamp when I started imaging and as time went by it went closer and light (and therefore the noise) increased with every image.

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Description: The red (grey) channel

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Astrometry.net job	3297390
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The Heart and Soul in Ha just above the brightest streetlamp around my backyard

The Heart and Soul in Ha just above the brightest streetlamp around my backyard

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The Heart and Soul in Ha just above the brightest streetlamp around my backyard

The Heart and Soul in Ha just above the brightest streetlamp around my backyard

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