NGC6543 - Cat's Eye Nebula (0 vote)  
Draco

Small nebula full of strcuture details		  
 
The Cat's Eye Nebula (NGC 6543) is a planetary nebula in the constellation of Draco. Structurally, it is one of the most complex nebulae known, with high-resolution Hubble Space Telescope observations revealing remarkable structures such as knots, jets and sinewy arc-like features.

It was discovered by William Herschel on February 15, 1786, and was the first planetary nebula whose spectrum was investigated by the English amateur astronomer William Huggins in 1864.

Modern studies reveal several mysteries. The intricacy of the structure may be caused in part by material ejected from a binary central star, but as yet, there is no direct evidence that the central star has a companion. Also, measurements of chemical abundances reveal a large discrepancy between measurements done by two different methods, the cause of which is uncertain.		  
 
TECHNICAL DATA:  
Location:  
 Valdemorillo - Madrid - Spain
Date:  
 jul 11, 2009
Conditions:  
 Normal
Temperature:  
 20ººC
Humidity:  
 low
 
Telescope:  
 Meade SC8" f/10
Reducer/corrector:  
 No reducer
Filter:  
 IDAS LPS 2"
Mount:  
 Vixen GPD2 Autostar Meade
Camera:  
 Canon 350D no filter
Exposure:  
 25x60s@200ISO
Guiding tube:  
 B&C 60/350 f7
Guiding camera:  
 Meade DSI Pro
Guiding software:  
 PHD Guiding
 
Procesing:  
  
Notes:  
  
     
   
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