Taken over the course of 35 nights, this is 193 hours of integration time from my Bortle 8.5 backyard in Nashville, TN.
The California Nebula is strong in H-alpha signal, so trying to bring out the fainter structures can be a challenge. As usual, I’m using a “time is the filter” approach…imaging from heavily light-polluted backyard is basically a commitment to patience (even with strong filters), but with enough time, you can get a good amount of signal.
There’s a surprising amount of complexity beyond the obvious emission: darker pockets, interesting texture, and layered structure that gives it a bit of depth (I think it looks like ocean waves, which is fitting.)
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