IC1805, The Heart Nebula

IC1805, The Heart Nebula

Constellation: Casseopiea
Ra: 2h 27m 24s
Dec: +62d 7m 16s
Distance: 7,500 light years
North: Up



Astrodon 6 nm H-a, SII and OIII filters. Data collected with CCDAutoPilot2.55 and processed in CCDStack and Photoshop CS2.  SII = Red, H-a = Green, OIII = Blue
An excellent description of the Heart Nebula can be found on Rob Gendler’s site at:
According to this writeup, these emission nebula are 7500 light years distant,  IC1805, The Heart Nebula, is the large emission nebula in the center of the frame and IC1795 is the bright projection with the crossing dust lane near the top.  The bright cluster near the center of IC1805 formed about 4 million years ago and caused its expansion into IC1975, which, in turn, caused a more recent burst of star formation about 100,000 years ago. IC1805 is about 300 light years across.
The H-a image is presented below:

Exposure: 4.75 hrs Total; 1.25 H-a, 1.75 hrs each OIII, SII
Telescope: Takahashi FSQ106N 4
Mount: Takahashi EM-200 GoTo
Oag: Astrodon MonsterMOAG
Acquisition: CCD AutoPilot2.25
Calibration: CCDStack
Observatory Site: Sacramento, CA (backyard)
Camera: SBIG STL11000
Filters: Astrodon 6 nm H-a, OIII, SII
Guider: SBIG STL Remote
Camera Operation: MaximDL4.62
Processing: Photoshop CS2
Image Date: 09/23/2006

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