M78 Ha-LRGB Bortle 8-9 (Leonardo Ruiz)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: 51 Ori · M 78 · NGC 2064 · NGC 2067 · NGC 2068 · NGC 2071 · NGC 2112 · The star b Ori

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M78 Ha-LRGB Bortle 8-9

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M78 Ha-LRGB Bortle 8-9

The objective was to obtain a natural color image in a very polluted sky. Broadband on Bortle 8-9 is a challenge.
The bortle value on[url=http:// https://www.lightpollutionmap.info] https://www.lightpollutionmap.info[/url] showed for my house a value of Bortle6 or 19.29 mag./arc sec2, but all the photos came out blown, with large gradients. Finally I bought an SQM and the reading was 17.4 to 17.98 at best, a Bortle 8 to 9.
Choosing the best times, in which M78 was at an altitude of 68° and taking captures up to a limit of 36 ° altitude, managed to maintain SQM values of 17.9 to 17.98 mag./arc sec2, the best sky I can have.
Gain 0, Bin 1 and exposure times of 60" for luminance and Blue and 120" for RG. Another detail, is that in the blue channel the stars appear larger than in the rest of canals, which causes a bluish halo and increase the size of stars.

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
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Astrometry.net job	9400399
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M78 Ha-LRGB Bortle 8-9

M78 Ha-LRGB Bortle 8-9

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M78 Ha-LRGB Bortle 8-9

M78 Ha-LRGB Bortle 8-9

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