Bubble nebula
The Bubble nebula in the constellation Cassiopeia
DESCRIPTION |
The Bubble nebula (NGC 7635) is a H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, the 15 ± 5 M☉, SAO 20575 (BD+60 2522). The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. It was discovered in 1787 by Friedrich Wilhelm Herschel. The star SAO 20575 or BD+602522 is thought to have a mass of 10-40 Solar masses. Wikipedia informations |
ACQUISITION |
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Date & Location |
2, 3, 5 Aout 2011 – Lozère, France |
Telescope/Optics |
Takahashi FSQ 106ED |
Mount |
Takahashi EM200 |
Camera CCD |
SBIG STL 4020M |
Focuser |
Robofocus/FocuxMax |
Filters |
Ha/SII/OIII Astrodon filters |
Guidage |
Off-axis MMOAG (Astrodon) STL remote guider TC-237H |
IMAGING PROCESS |
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Exposures |
Ha(21*15min) SII(18*15min) OIII(18*15min) Total : 14h30 Out temperature : 13°C In CCD temperature : -25° |
Softwares for acquisition |
Robofocus, Focusmax, MaximDL, TheShy6 Pro, CCDAP 4 |
Softwares for digital image processing
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Calibration, Registration, Color stack with CCDstack 1.0 (CCDIS plug-in) Full processing with |