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.