
| Object Info | |
| Objects | NGC7293 - The Helix nebula |
| Type | Planetary Nebula IV + III |
| Centered at: | RA: 22:29.6 DEC: -20:48 |
| Constellation | Aquarius |
| Magnitude | 7.3 |
| Size | 2 light years |
| Distance | 425 light years (the closest planetary nebula to us) |
| Age | ? |
| Dimensions | > 13 arcminutes |
| Image Field | 31'07" x 20'52" |
| Notes |
Schuler 10nm Hydrogen Alpha was used for the Ha luminance image. |
| Taken from: |
Tin Shed Observatory
Gold Coast, Queensland Long - Lat = 153:23.54E - 27:56.8S |
| On: | Ha 5th August 2003. RGB reused from 27th July 2003 |
| Image Info | |
| Telescope | Celestron C11 @ f5.9 |
| Focal Length | 1652 millimetres |
| Telescope guiding | Guided by ST5c on Synta 102mm f5 (500mm) |
| Telescope control | Astrometric Sky Walker II |
| CCD camera | SBIG ST-10xe |
| Camera cooling | Regulated Thermoelectric |
| Camera pixels | 2184 x 1472 x 6.8um |
| Image scale | 0.7 arcseconds per pixel |
| Processed with: | Mira A/P, Maxim DL, AIP4Win, CCDSharp, Photoshop |
| Exposure times | Ha,R,G,B = 65,25,25,25 RGB taken as 5-minute unbinned subimages. |
| Image Calibrations | All sub-images Dark Subtracted, Flat Fielded. |