|
Instrument |
Celestron
C11 @ ~f/10.48 (2930 mm fl) 1.26 arcsec / pixel.
Resampled to 1.90 arsec / pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
internal filter wheel, AstroDon Filters |
|
Acquisition Data |
12/05/2007 to 12/20/2007
Chino Valley... with CCDAutoPilot3 |
|
Exposure |
LumHa (HaR)GB combine.
40% of H-Alpha data was combined with the Lum and Red channels,
using the Photoshop lighten option.
Lum
340 min. (34 x 10 bin 2x2)
Ha
300 min. (10 x 30 bin 2x2)
RGB 270 min. (9 x 10 bin 3x3) each |
|
Software |
CCDSoft,
Sigma-Clip, Photoshop CS w/ the Fits Liberator plugin, Paint Shop
Pro,and Noel
Carboni's actions |
|
Comment |
North is to the
top.
The Cone Nebula, located about 2700 light years away, was discovered
by William Herschel on December 26, 1785. Features in the image
include red emission from diffuse interstellar hydrogen and wispy
filaments of dark dust. The dark Cone Nebula region clearly contains
much dust which blocks light from the emission nebula and open
cluster NGC 2264 behind it. One hypothesis holds that the Cone
Nebula is formed by wind particles from an energetic source blowing
past the Bok Globule at the head of the cone.
Source:
NASA APOD
|
