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Big Brain Nebula - Sh2-261 - Hubble Palette

Technical card

Imaging telescopes or lenses: Explore Scientific ES127mm f/7.5 ED APO triplet

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Celestron CGX

Guiding telescopes or lenses: Orion ST 80

Guiding cameras: Lodestar X2

Software: Photoshop CS3  ·  PHD2  ·  Sequence Generator Pro  ·  PixInsight

Filters: Astronomik OIII  ·  Astronomik SII  ·  Ha

Accessory: Hotech 2" SCA Self-Centering Field Flattene Hotech SCA Field Flattner  ·  ZWO 8x 1.25" Filter Wheel (EFW)  ·  MoonLite 2.5" Focuser with MotorFocus  ·  QHYCCD PoleMaster

Basic astrometry details job: 3501988

RA center: 6h 9' 0"

DEC center: +15° 44' 24"

Pixel scale: 1.386 arcsec/pixel

Orientation: 358.112 degrees

Field radius: 0.528 degrees

Resolution: 1934x1946

Data source: Backyard


This is actually Lower's Nebula, but I think it looks like a brain (including a brain stem).

All of the data was captured in March and April of 2020.


Astronomik Ha: 138x240" (gain: 139, offset: 21)
Astronomik OIII: 145x240" (gain: 75, offset: 15)
Astronomik SII: 141x240" (gain: 139, offset: 21)

Integration: 28.27 hours



Chuck's Astrophot...

Sky plot

Sky plot


Big Brain Nebula - Sh2-261 - Hubble Palette, 


            Chuck's Astrophot...