Celestial hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  46 ksi Per  ·  California Nebula  ·  IC 2005  ·  LBN 752  ·  LBN 756  ·  LDN 1462  ·  LDN 1463  ·  LDN 1464  ·  LDN 1469  ·  Menkib  ·  NGC 1499  ·  Sh2-220  ·  The star ξPer
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NGC 1499 - California Nebula in HsGO, Eduardo Barbosa
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NGC 1499 - California Nebula in HsGO

Getting plate-solving status, please wait...
NGC 1499 - California Nebula in HsGO, Eduardo Barbosa
Powered byPixInsight

NGC 1499 - California Nebula in HsGO

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Description

The California Nebula, captured on 5 November 2021 in a Bortle 4 area.

I wasn't entirely happy with the HOO combination, so I've decided to create a synthetic Green channel by mixing both Ha and OIII in order to get a pleasant, albeit a bit noisy result. I've sticked with it since it gave it an ethereal atmosphere that the HOO combination wasn't reaching.

Image details:
24 X 300' Ha
32 X 300' OIII

Combination details:
Ludo aka thecoldestnights formula

R = Ha
G = ((OIII * Ha)^~(OIII * Ha)) * Ha + ~((OIII * Ha)^~(OIII * Ha))*OIII
B = (OIII * 0.9)+ (Ha * 0.1)

Location:
Serra da Freita, Portugal
Bortle 4 Sky

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NGC 1499 - California Nebula in HsGO, Eduardo Barbosa