|
NGC 6888 (Cyg)
Click on the image for a larger version
| Date/Site: |
17. and 22. Oktober, 5. November 2024, e-EyE |
Exposure/
Filter: |
R: 6 x 180 seconds,
G: 6 x 180 seconds,
B: 6 x 180 seconds,
Hα: 12 x 300 seconds,
O3: 16 x 300 seconds (-5°C) |
Camera/
Optics/
Instrument: |
ASI 2600MM Pro with Astronomik Type 2c-filter on 400mm f/5 Newton with 2" TS Comacorrector on AP1200 GTO |
|
Data acquired remotely using N.I.N.A.,
Off-Axis-Guiding with ASI120,
Focusing with Microtouch,
Calibration with MaximDL 6, processing in PixInsight 1.8 |
The Crescent nebula in the middle of the Cygnus milky way is a rewarding object for narrowband imaging.
Starless Hα- and O3-frames were combined to create a colour-picture using the HOO-palette. Then the stars of the RGB-image were added.
NGC 6888 (Cyg) starless
Click on the image for a larger version
NGC 6888 (Cyg), 2020
Click on the image for a larger version
| Date/Site: |
13. and 19. July 2020. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filters: |
R: 9 x 180 seconds,
G: 5 x 180 seconds,
B: 5 x 180 seconds,
Hα: 28 x 300 seconds,
O3: 19 x 300 seconds, (-20°C) |
| Camera: |
Moravian G3-16200 with Astronomik Type II-filters |
Optics/
Instrument: |
250mm f/4,7 Newton with VIP-3010 Paracorr on 10Micron GM1000 HPS |
|
Guiding: Lodestar attached to a 61mm-finder,
focusing: Microtouch and FocusMax,
data acquired remotely using CCD-Commander and MaximDL 6,
calibration and processing: PixInsight 1.8 |
This is the result of the "first light"-frames after the replacement of the 2"-RCC1-corrector/QSI-combination by the 3"-Paracorr and the Moravian G3-16200.
For this image all nebulae (and the RBI-flash-artefacts) were subtracted from the RGB-image. Using Starnet++ starless versions were created from the Hα- and O3-stacks and the resulting image was integrated into the RGB-data.
A somewhat older version is here:
NGC 6888 (Cyg), 2014
Click on the image for a larger version
| Date/Site: |
4. July 2014, AAR-observatory in Presberg |
Exposure/
Filter: |
RGB: all 3 x 300 seconds
Hα, O3: all 3 x 600 seconds (-20°C) |
| Camera: |
QSI 632 with SBIG and Baader-filters,
Guiding off-axis with Lodestar |
Optics/
Instrument: |
40cm f5 Newton on AP1200 |
|
Focusing with MicroTouch and FocusMax,
image acquisition: CCD-Commander and MaximDL 5,
calibration: MaximDL 5,
processing: PixInsight 1.8 |
This was the first time a sequence with the 40cm-Newton could be completed in one night. Exposures were all quite short. Nevertheless no denoising was done.
The O3-frames were captured in the beginning of dawn.
This is an earlier image shot in Southern Tyrole during a Föhnstorm:
NGC 6888, Crescent-Nebula (Cyg), 2007
Click on the image for a larger version
| Date/Site: |
August 10., 2007, Rifugio Monte Muro, Maurerberg, Southern Tyrol |
Exposure/
Filter: |
13 x 6 minutes |
| Camera: |
Canon EOS 300Da |
Optics/
Instrument: |
6"-Newton on Gemini 41 Observatory mount, Baader-coma-corrector |
|
focusing with RoboFocus and DSLR Focus |
|
webcam-guiding with MaximDSLR through 4"-FH-refractor |
|
Darks: Fitswork,
aligning and stacking: MaximDSLR,
levels and curves: Photoshop CS |
|