|
Object |
Helix Nebula-
NGC 7293 |
|
Info |
NGC 7293 is the nearest planetary
nebula to the Sun, only about 300 L.y. away and is commonly known as the
Helix Nebula. It is the largest planetary nebula in apparent size,
covering 1/4degree of sky, half the apparent size of the moon. Despite its
size the Helix Nebula
is quite faint and needs long exposures to bring detail out.
|
|
Date |
Lum 9th &
18th/ 7/ 07 & rgb 8/ 8/ 07 |
|
Location |
BayTop
Observatory- Streaky Bay South Australia |
|
Instrument |
Home built 10" Newtonian (Bob
Royce primary) and an Antares 1/20th wave
secondary with MPCC
coma corrector. System working
@ native f4/
1016 FL 1.35 arcsec/pixel- FOV
23.3x29.4 |
|
Mount |
Celestron CI700 controlled by a Mel
Bartels Goto Control System
with Vexta PK264m-01b motors with a pulley and belt system |
|
Camera (CCD) |
Starlight
Xpress HX916 monochrome CCD with Atik manual
filter wheel. |
|
Exposures |
L:
90' R:45' G:45' B:45' (3' sub exposures all
unbinned) No dark frames removed. |
|
Guiding |
Orion
80ED refractor F7.5 with a Starlight Xpress HX516
CCD. Mounted via a side by side accessory
plate. |
|
Filters |
Astronomik
typeII clr RGB filter set |
|
Notes/ Conditions |
Conditions- On all the nights taking lum and rgb channels
were quite poor. Had gradients to remove in the color channels.Image has
been cropped slightly to compensate for rotation due to the large
difference of time when the data was collected. Overall, the image was
sharpened to offset the softness of the stars. |
