Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
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Flying Bat (Sh-2 129) and Squid Nebula (Ou4), 


            Marc Schuh
Flying Bat (Sh-2 129) and Squid Nebula (Ou4)
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Flying Bat (Sh-2 129) and Squid Nebula (Ou4)

Technical card

Imaging telescopes or lenses: TS Optics Photoline 70/420 Triplet

Imaging cameras: ZWO ASI1600MM-P

Mounts: Celestron Advanced VX

Guiding telescopes or lenses: 50mm Guidescope

Guiding cameras: T7C

Focal reducers: TS Optics Photoline 0.79x reducer / corrector

Software: SharpCap pro  ·  Pleiades Astrophoto S.L. PinInsight  ·  PHD2  ·  Nighttime Imaging 'N' Astronomy

Filters: Optolong Ha 31 mm 7 nm  ·  Optolong OIII 31 mm 6.5 nm

Accessory: Zwo EAF  ·  Zwo EFW

Dates:July 13, 2020Aug. 21, 2020

Optolong Ha 31 mm 7 nm: 123x300"
Optolong OIII 31 mm 6.5 nm: 131x300"

Integration: 21.2 hours

Avg. Moon age: 12.65 days

Avg. Moon phase: 26.57%

Basic astrometry details

Astrometry.net job: 3800728

RA center: 21h 9' 23"

DEC center: +59° 56' 6"

Pixel scale: 2.488 arcsec/pixel

Orientation: 158.423 degrees

Field radius: 1.701 degrees

Resolution: 4084x2752

Locations: Heimsternwarte, -, Burgenland, Austria

Data source: Backyard


My longest integration so far and first light for my small TS 70/420 mm triplet. Oiii on this object is very faint, not even barely visible on a single 300" exposure.+


Ha: 2020-07-13, 2020-07-20, 2020-08-07

Oiii: 2020-08-20, 2020-08-21

Editing workflow:


Crop, DBE, Decon (deringing and pixmath), Denoise (TGV+MMT), MaskedStretch, HT, LHE, Curves, MLT (sharpening and NR), ACDNR


DBE, Decon (Deringing and PM repair), TGVDenoise, HT, LHE, ACDNR, LHE


For the color:

Combine Ha and Oiii with:

R: Ha
G: ((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii
B: Oiii

For the detail:

Create syn lum with max(Oiii, Ha)

LRGBCombination of the both

Crop out bad non overlapping edges, Curves, EZStarReduction (A. Block Method), MLT (NR), ACDNR, Curves

Downscale to a reasonable size.


Sky plot

Sky plot


Flying Bat (Sh-2 129) and Squid Nebula (Ou4), 


            Marc Schuh

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