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California Nebula in Ha, [SII] and Hb light
I decided to shoot some Hbeta last night and turned my attention to
NGC1499/Calif Nebula. It was interesting to me to see no [OIII] at all yet pretty significant Hbeta emission. From an ionization potential perspective, Hb is greater than [OIII] but there is little if any [OIII] in that object. Perhaps there's just not any oxygen in the cloud to get ionized? Anyway, here is the image: http://www.rdcrisp.darkhorizons.org/...ssion_page.htm This time I assigned Ha to Red, and [SII] to Green with Hb assigned to Blue. I had a bit of a light gradient that I think originated with a light fog we had last night. I think that caused reflection of the city lights, despite the use of emission line filters. |
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