Hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  10 Gem  ·  11 Gem  ·  12 Gem  ·  13 mu. Gem  ·  7 eta Gem  ·  9 Gem  ·  IC 443  ·  IC 444  ·  IC443  ·  IC444  ·  Part of the constellation Gemini (Gem)  ·  Sh2-248  ·  Sh2-249  ·  Tejat Posterior  ·  Tejat Prior  ·  The star Propus (ηGem)  ·  The star μGem
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IC443 & SH2-249 - Medusa Nebula area, 


            Pascal Gouraud
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IC443 & SH2-249 - Medusa Nebula area

Imaging telescopes or lenses: Celestron RASA 8" f/2 Astrograph

Imaging cameras: ZWO ASI 1600MM-Cool Pro ASI 1600MM pro

Mounts: iOptron CEM40

Guiding telescopes or lenses: Altair 50mm Guide Scope

Guiding cameras: ZWO ASI 178MM

Software: PHD2 Guiding  ·  SGP  ·  Pleiades Astrophoto PixInsight 1.8.5 Ripley

Filters: Baader F/2 Ha

Dates:Jan. 19, 2020

Frames: 54x300"

Integration: 4.5 hours

Avg. Moon age: 24.19 days

Avg. Moon phase: 28.98%

Astrometry.net job: 3213871

RA center: 6h 20' 19"

DEC center: +22° 44' 54"

Pixel scale: 4.388 arcsec/pixel

Orientation: 29.939 degrees

Field radius: 1.553 degrees

Resolution: 2048x1519

Locations: La Couyere, La Couyere, Ille et Vilaine, France

Data source: Backyard


Large Field taken in January 19th and 22nd with my RASA 8" .
Medusa Nebula area is quite a challenge to process.
Still some halos on the 2 Gemina stars, due to the combination of F2 + narrowband Ha filter and ASI1600MM camera.
Ha taken with ASI1600 (4h30m and 54 shots of 300seconds)
RGB taken with ASI294 color camera (1h44m and 52 shots of 120seconds)
First time, i was combining 2 differten setuo in PIxinsight.
Color result also published after.



  • Final
    IC443 & SH2-249 - Medusa Nebula area, 


            Pascal Gouraud


Description: Reprocessing of Ha (to avoid too strong noise reduction)

Uploaded: ...

Sky plot

Sky plot


IC443 & SH2-249 - Medusa Nebula area, 


            Pascal Gouraud

In these public groups

Celestron RASA