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HERE TO SEE NARROWBAND/NARROWBAND+NIR/NIR ONLY ANIMATIONEMISSION NEBULA NGC 6888, THE CRESCENT NEBULA
CLICK
HERE TO SEE NARROWBAND/NARROWBAND+NIR/NIR ONLY ANIMATION
(click on images for larger size):
Hubble Pallet (SII=Red, Ha = Green, OIII=Blue): CFHT Pallet (Ha=Red, OIII=Green, SII=Blue):
Near-Infrared Filters
(>850nm=Red, 800-900nm=Green, 700-800nm=Blue):
Image acquisition and processing details:
| Telescope: | Takahashi Epsilon 180 astrograph, f/2.8 |
| Mount: | Celestron CGE, remotely controlled with NexRemote. |
| Camera: | SBIG ST-10XME cooled to -20C, internal guiding. All images binned 1x1, dark-subtracted and flat-fielded. |
| Filters, Exposure Times: | AstroDon 6nm Hydrogen-alpha, Oxygen III, and Silicon II filters. Also AstroDon Near-Infrared "NIR Tricolor Filters" covering 700-800nm, 800-900nm, and >850nm. Ha 200min (20x600s), OIII 130 min (13x600s), SII 180 min (18x600s). NIR1 24 min (12x120s), NIR2 32 min (16x120s), NIR3 30 min (15x120s). |
| Dates (Universal Coordinated Time): | 27, 28, 29, and 30 May 2008 |
| Moon Phase: | 55% - 24% |
| Location: | Xanadu Observatory (backyard setup) |
| Software: | CCD Autopilot, FocusMax, MaximDL, TheSky, CCDStack, Adobe Photoshop CS2, Adobe ImageReady |
| Notes: | This was my first image taken with the NIR filters. Seeing was not good so the images are somewhat less resolution than I had hoped for. |