IC1805 (Heart Nebula)

clic for 36% size 1431 x 953 (479 kB)

Clic here for 60% size 2385x1588 (1032 kB)

About this Image

The Heart nebula in Cassiopeia is an extended complex Ha region. The distance to this area is estimated at approx. 2500 light years.
The nebula, which is close to IC 1848, is excited by the open star cluster near the center, young, hot stars. It interferes with dark dusty material, eroded from the radiation of the stars.
The top right bright part is named NGC 896.
North is up.
Below you see the center of the nebula in 50/100% size.
At bottom a crop on NGC 896 in 50/100% size.

clic for 100% size 1011 x 549 (118 kB)

clic for 100% size 693 x 645 (91 kB)

Technical Details


105mm TMB refractor with flattener at f/6.5

Mount MK-100 GEM
Camera SBIG STL-11000M at -20C, internal filter wheel
Filters Astronomik H-alpha (15 nm)
Date H-alpha: May 11, 2004.
RGB: Aug 29, 2004
Location Wildon/Austria
Sky Conditions mag 4.5, full moon, temperature 12-15 C,
Exposure Ha = 250 minutes (15-minute sub-exposures),
all 1x1.
Processing Image aquisition in Maxim DL 4.0; Image calibration, aligning, mean stacking, DDP and color synthesis in ImagesPlus; Noise reduction by Neatimage;
Photoshop: curves and final processing; size 20/36/60%;