Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Getting plate-solving status, please wait...
IC1318 The Butterfly Nebula, 


IC1318 The Butterfly Nebula
Powered byPixInsight

IC1318 The Butterfly Nebula

Technical card

Imaging telescopes or lenses: Meade LX200 12" f/10

Imaging cameras: Atik 383L+ mono

Mounts: iOptron CEM 120

Guiding telescopes or lenses: Meade LX200 12" f/10

Guiding cameras: Lodestar

Focal reducers: Starizona SCT Corrector f/7.5

Software: Sequence Generator Pro  ·  PHD guiding  ·  PixInsight  ·  Dithering

Filters: Astronomik SII 12nm 1.25"  ·  Astronomik OIII 12nm 1.25"  ·  Astronomik Ha 12nm 1.25"

Accessory: Hutech Mitsuboshi OAG5 Guider  ·  Atik EFW2 Filter Wheel  ·  Starizona MicroTouch Autofocuser

Dates:Aug. 9, 2020Aug. 10, 2020

Astronomik Ha 12nm 1.25": 25x600" -10C bin 1x1
Astronomik OIII 12nm 1.25": 23x600" -10C bin 1x1
Astronomik SII 12nm 1.25": 21x600" -10C bin 1x1

Integration: 11.5 hours

Darks: ~30

Flats: ~30

Bias: ~100

Avg. Moon age: 20.63 days

Avg. Moon phase: 65.83%

Basic astrometry details job: 3753605

RA center: 20h 16' 41"

DEC center: +41° 51' 32"

Pixel scale: 0.510 arcsec/pixel

Orientation: 178.816 degrees

Field radius: 0.289 degrees

Resolution: 3267x2437

Locations: Lighthouse Observatory, Burleson, Texas, United States

Data source: Backyard


The Sadr Region (also known as IC 1318 or the Gamma Cygni Nebula) is the diffuse emission nebula surrounding Sadr (γ Cygni) at the center of Cygnus's cross. The Sadr Region is one of the surrounding nebulous regions; others include the Butterfly Nebula and the Crescent Nebula. It contains many dark nebulae in addition to the emission diffuse nebulae.
Sadr itself has approximately a magnitude of 2.2. The nebulous regions around the region are also fairly bright. [Source: Wikipedia].

CAPTURE Information:
The image was captured with the iOptron CEM120 mount , the venerable Meade 12"LX200 SCT, and my Atik 383L+ mono CCD at F7.16 (2182mm FL).

Image subs were taken through Astronomik's narrowband filters Ha, SII and OIII.

IMAGE information -- 2020
Ha : 25 subs (4.17 hr) on Aug 9th and 10th.
OIII : 23 subs (3.83 hr) on Aug 9th and 10th.
SII : 21 subs (3.33 hr) on Aug 9th and 10th.

All exposures were at 10 minutes (600s) each, 1x1 bin and -10C.

Processing was done with PixInsight, following (for the most part) kayronjm's tutorial of Feb. 24th from several years back.

Ha, SII and OIII were combined after integration/crop/DBE for creating the Hubble Palette, using PixelMath and the following formula:
Red = SII
Grn = Ha
Blu = OIII
Luminance was created using only subs from the Ha filter.
North is up (pretty sure), and this is a very slight crop due to the various movement of different subs.

As was true of the Lion Nebula (SH2-132), this complete nebula is somewhat larger than my setup’s field of view. Consequently the presented image is the central 50% of the total.
As typical of my processing I over did the color. However, I was pleased to achieve some of the colors done by more talented folks than me.



License: None (All rights reserved)


  • IC1318 The Butterfly Nebula, 


  • Final
    IC1318 The Butterfly Nebula, 



Sky plot

Sky plot


IC1318 The Butterfly Nebula,