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Contains:  NGC 2239, NGC 2244, Rosette nebula, The star 12Mon
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A Rosa do Céu (Sky's Rose) -  Caldwell 49, 


            Eduardo Oliveira
A Rosa do Céu (Sky's Rose) -  Caldwell 49
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A Rosa do Céu (Sky's Rose) - Caldwell 49

Technical card

Imaging telescopes or lenses: Megrez 90

Imaging cameras: Atik 314L+ Mono

Mounts: Orion Atlas EQ-G

Guiding telescopes or lenses: Orion ShortTube 80

Guiding cameras: Orion StarShoot AutoGuider

Focal reducers: Televue TRF-2008

Software: EQASCOM  ·  PHD GUIDING  ·  Pixinsight

Filters: Baader Planetarium OIII 8.5nm 1.25"  ·  Baader Planetarium H-Alpha 7nm 1.25"  ·  Baader Planetarium SII 8nm 1.25"

Accessory: ATIK EFW2

Dates:Jan. 28, 2017Jan. 29, 2017Jan. 30, 2017

Baader Planetarium H-Alpha 7nm 1.25": 46x300" -10C bin 1x1
Baader Planetarium OIII 8.5nm 1.25": 13x300" -10C bin 1x1
Baader Planetarium SII 8nm 1.25": 12x300" -10C bin 1x1

Integration: 5.9 hours

Darks: ~86

Bias: ~560

Avg. Moon age: 1.47 days

Avg. Moon phase: 3.14%

Basic astrometry details job: 1448400

RA center: 6h 32' 11"

DEC center: +5° 0' 21"

Pixel scale: 1.440 arcsec/pixel

Orientation: -103.204 degrees

Field radius: 0.682 degrees

Resolution: 2728x2048

Locations: Home Observatory, Diamantina, MG, Brazil

Data source: Backyard


A first attempt at NB imaging the Rosette Nebula. I had a window of 3 days of somewhat clear skies to complete this image. I managed to capture enough Ha frames, but it certainly needed more OIII and specially SII data.

"The Rosette Nebula (also known as Caldwell 49) is a large, spherical (circular in appearance), H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.
The cluster and nebula lie at a distance of some 5,000 light-years from Earth[3]) and measure roughly 50 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.

A survey of the nebula with the Chandra X-ray Observatory has revealed the presence of numerous new-born stars inside optical Rosette Nebula and studded within a dense molecular cloud. Altogether, approximately 2500 young stars lie in this star-forming complex, including the massive O-type stars HD 46223 and HD 46150, which are primarily responsible for blowing the ionized bubble. Most of the ongoing star-formation activity is occurring in the dense molecular cloud to the south east of the bubble."

Source: Wikipedia



Eduardo Oliveira
License: None (All rights reserved)


  • Final
    A Rosa do Céu (Sky's Rose) -  Caldwell 49, 


            Eduardo Oliveira

Sky plot

Sky plot


A Rosa do Céu (Sky's Rose) -  Caldwell 49, 


            Eduardo Oliveira