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Contains:  12 Mon, NGC 2239, NGC 2244, NGC 2252, NGC2237, NGC2238, NGC2239, NGC2244, NGC2246, NGC2252, Rosette nebula, Sh2-275, The star 12Mon
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Rosetta Nebula (NGC2237) in HSTrgb, 


            Jose Carballada
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Rosetta Nebula (NGC2237) in HSTrgb

Technical card

Dates:Dec. 31, 2018Jan. 1, 2019Jan. 2, 2019Jan. 3, 2019Jan. 5, 2019

Astrodon B Gen.2 E-series 36mm: 20x10" (gain: 200.00) -20C bin 1x1
Astrodon G Gen.2 E-series 36mm: 25x10" (gain: 200.00) -20C bin 1x1
Astrodon HA 36mm - 5nm: 247x180" (gain: 200.00) -20C bin 1x1
Astrodon O-III 36mm - 5nm: 53x300" (gain: 200.00) -20C bin 1x1
Astrodon R Gen.2 E-series 36mm: 40x10" (gain: 200.00) -20C bin 1x1
Astrodon S-II 36mm - 5nm: 52x180" (gain: 200.00) -20C bin 1x1

Integration: 19.6 hours

Avg. Moon age: 26.38 days

Avg. Moon phase: 13.18% job: 2501799

RA center: 6h 31' 58"

DEC center: +4° 58' 14"

Pixel scale: 1.469 arcsec/pixel

Orientation: 89.630 degrees

Field radius: 1.151 degrees

Resolution: 4445x3480

Locations: AAS Montsec, Àger, Lleida, Spain

Data source: Own remote observatory

Remote source: Non-commercial independent facility


A classic process for a classic target, one of the most beautiful and accessible nebula.

I tried to reveal all the complexity on the nebular gases.

It was a difficult object on my old location because theri max altitude is 53º and it was poorly visible. Now in Montsec it's still at 53º max but with clear horizon it was possible to add close to 20 hours of end integration.

"The cluster and nebula lie at a distance of some 5,000 light-years from Earth and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses."
(credits description: Wikipedia)



Jose Carballada
License: Attribution-NonCommercial-ShareAlike Creative Commons


  • Rosetta Nebula (NGC2237) in HSTrgb, 


            Jose Carballada
  • Rosetta Nebula (NGC2237) in HSTrgb, 


            Jose Carballada
  • Final
    Rosetta Nebula (NGC2237) in HSTrgb, 


            Jose Carballada


Description: less green channel dominant


Description: Final version with full res

Sky plot

Sky plot


Rosetta Nebula (NGC2237) in HSTrgb, 


            Jose Carballada