NGC 6888
HaOIIISII
HαOIIIOIII-HaOIIISII composite
Hα
|
0bject |
NGC 6888 'Crescent Nebula' in Cygnus |
| Date | July 16 -19, 2014 |
| Exposure | LHαOIIIOIII
60:240:240:60 (OIII+Hα 90/10) LHαOIIISII 60:240:240:60 (OIII+Hα and SII+Hα 90/10) |
| Camera | STL11000M with Baader narrow band filters |
| Telescope | ASA 10N f/3.6 on AP900 GTO CP03 |
| Guiding | External guide head with 50 mm Borg |
| Processing | MaximDL, PhotoshopCS6 |
| Comments | Mild temps, some moonlight; acquired with CCD Commander |
|
0bject |
NGC 6888 'Crescent Nebula' in Cygnus |
| Date | June 25 - July 1, 2012 |
| Exposure | HαOIIIRGB
420:420:40:40:40 (Dan Crowson)
Ha RGB 255:60:60:60 (Gregg Ruppel) |
| Camera | ST8300 with SBIG
filters (Dan) STL11000M with AstroDon Gen II filters (Gregg) |
| Telescope | AstroTech RC 6 f/8 on
Atlas mount (Dan) ASA 10N f/3.6 on AP900 GTO CP03 (Gregg) |
| Guiding | Off-axis guider (Dan) External guide head with 50 mm Borg (Gregg) |
| Processing | MaximDL, Photoshop CS5, AstroActions |
| Comments | Very warm, moderate seeing; images combined with layers and masks in PS |
Full resolution crop
Bubble
|
0bject |
NGC 6888 'Crescent Nebula' in Cygnus |
| Date | June 25-26, 2009 |
| Exposure | HαHαOIIIOIII 120:120:120:120 (unbinned) |
| Camera | STL11000M with Baader narrow band filters |
| Telescope | ASA 10N f/3.6 on Losmandy G11 w/Gemini |
| Guiding | External guide head with E-finder |
| Processing | MaximDL, Photoshop CS3 |
| Comments | Hot and humid, camera temp -10șC |
|
0bject |
NGC 6888 'Crescent Nebula' in Cygnus |
| Date | 11/1/2005 |
| Exposure | Hα 6 x 900 |
| Camera | SXV-H9 w/ Schuler filters |
| Telescope | Takahashi Sky90 f/4.5 on Losmandy G11 w/Gemini |
| Guiding | ST-4 |
| Processing | MaximDL, FITS Liberator, Photoshop CS, Astro Actions |
| Comments | Clear and cool |
|
0bject |
NGC 6888 Crescent Nebula in Cygnus |
| Date | 7/19 and 7/20/2004 |
| Exposure | HaLRGB 120:40:15:5:15 (Ha used for Red and L - top) (Ha+R 50/50 used for Ha and Red channels - bottom) |
| Camera | SXV-H9 w/ Schuler filters |
| Telescope | Takahashi FC-76 f/8 |
| Guiding | ST-4 guided on GM-8 |
| Processing | MaximDL, AIP4Win, Photoshop |
| Comments | Hot and humid, high thin clouds passing |
