I'm loving this NB setup. This is
Ha data taken on two nights over the last few days (nearly full moon). The first night I only captured 9 frames before the fog rolled in. The second night (last night) the sky was clear with no clouds or fog from 10:30 pm till 2:40 am. Although I heard a lot of fireworks during the entire time only one of the images showed any artifacts (a bright streak) and the PreProcessing removed it completely.
The full moon did increase the noise level.
- Moonless background flux = 53 photons/sec
Full Moon background flux = 137 photons/sec
Added noise factor = sqrt(137/53) = 1.6
Thus, the moon increased the noise by about 60%! Makes me wish I had a 3nm
Ha filter rather than my current 7nm filter. That would have reduced the noise by a factor of about 1.5. Note to self: Purchase 3nm
Ha and Siii filters. I already have a 3nm Oiii filter.
IMAGE INFORMATION:
WO Star 71 telescope, 7nm
Ha filter, ASI1600MM Pro, MMAG Autoguider, CEM40 mount
33 x 600 sec Lights (total Exposure 5
hr 30 min), Master Flats and Darks
APT, PHD2, PixInsight
Ha Image
W_Veil_Ha by
STEPHEN KING, on Flickr
Processing was carried out using a
starless version (shown below) created using the new starless approach.
Starless by
STEPHEN KING, on Flickr
Hoping to capture some Oiii tomorrow tonight if the forecast holds, and, if my body holds out. Definitely a nap tomorrow afternoon!
Thanks for looking.
Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website:
www.steveking.pictures