LDN 1158 Area, LRGB (Stephen Garretson)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

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LDN 1158 Area, LRGB

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LDN 1158 Area, LRGB

Here's LDN 1158 and friends, a small collection of dark nebulae just NW of the Iris Nebula in Cepheus. This was my first use of an Optolong L-Pro filter for the luminance channel in LRGB. Need to learn much more about processing dark nebulae, but am quite happy with the L-Pro.

For next time I switched the Red Astrodon filter out of the carousel on the Red scope, which has the L-Pro in a filter drawer between the filter wheel and the camera, to the Gold scope's carousel. This will allow me to shoot all luminance [with the L-Pro] on the Red scope while I rotate through RGB on the Gold scope. For the next dark nebula target I will gather as much L data as all three color channels combined. The narrowband filter distribution remains the same, facilitating simultaneous Ha, OIII, and SII data collection using the scopes in tandem.

I also need to rotate one of the scopes in its rings just slightly to more precisely line up the FOVs. I had to crop perhaps 15% due to this issue. Pretty easy to do; just needs doing!

[120] 60s guided subs each RGB

[180] 60s guided subs L-Pro

total integration: 9 hours

imaging:

Dual William Optics FLT 132 APOs [.8x flattener/reducers] operate at f/5.6

Dual ASI 183 Pro M Cooled cameras

Astrodon E Series Gen II RGB filters

Optolong L-Pro light pollution filter

guiding:

William Optics WhiteCat f/4.9 Astrograph

ASI 290 Mini M guide camera

Paramount MX+

capture:

TheSkyX, pointing and tracking

PHD2, guiding

SGP, capture

Starlight Xpress, filter wheel control

Starizona MicroTouch focus controllers

processing:

PixInsight, Preview

from the Beevo Dome

The refractors!
ZWO ASI183/QHY183

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Status	Advanced success
Started	...
Astrometry.net job	3559299
PixInsight job	ORO89PNQ13J94PK1CRLJ3CBJW319I6SO
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h41m47s.73
RA (top/left)	20h44m58s.44
RA (top/right)	20h44m34s.63
RA (bottom/right)	20h38m29s.98
RA (bottom/left)	20h39m07s.42

Dec (center)	+67°27′41″.6
Dec (top/left)	+67°00′46″.9
Dec (top/right)	+67°56′13″.1
Dec (bottom/right)	+67°54′21″.6
Dec (bottom/left)	+66°59′00″.1

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LDN 1158 Area, LRGB

LDN 1158 Area, LRGB

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LDN 1158 Area, LRGB

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