|
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-20
& RGB data 29/ 7/ 06 |
|
Location |
BayTop
Observatory- Streaky Bay South Australia |
|
Instrument |
Orion 80ED refractor working @ f7.5/
600 FL
2.3 arcsec/pixel |
|
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:48' G:48' B:48'
[6' sub exposures all unbinned]
No dark frames removed. |
|
Guiding |
Skywatcher ST 80mm f5
with a Starlight Xpress MX515 CCD. Mounted
via a side by side accessory plate. |
|
Filters |
Astronomik
typeII clr RGB filter set |
|
Notes/ Conditions |
Conditions- Taking lum on the 20th,
transparency and seeing was poor to
average. Taking colour on the conditions were
dewy, transparency average and seeing poor, Cloud and
fog came in during taking of blue channel exposures. Image reduced
to 85% of original. |
