NGC 6618 – Swan Nebula

Date/time:
14.08.2009 23:40 to 15.08.2009 00:10
15.08.2009 23:10 to 16.08.2009 00:15
16.08.2009 22:36 to 17.08.2009 00:10
Az./Alt. positions:  
200° / 21° to 208° / 19°
194° / 23° to 210° / 19°
186° / 24° to 211° / 18°
Ambient conditions: 15°C to 20°C, transparency 4/5, seeing 4/5
Location: Trier, Germany

Equipment:
Optics: TMB 92 SS f/5.5 with TSFlat 2
Mount: CGE
Guiding: selfguiding with ST-4000XCM
Camera: SBIG ST-4000XCM
Filter: IDAS LPS

Acquisition:
Software: CCDSoft V5
FOV, Image scale: 100.9 x 100.9 arcmin, 3.01 arcs/pixel
Sub-exposures: 5h 10min (31 x 10min at –15°C or –10°C),
50 x 10min dark frames at –10°C and –15°C,
30 x 0.7s EL flats at –5°C
50 bias at –5°C for flats calibration

Processing:
Images Plus 3.75. Calibration, stacking, DDP, noise reduction and deconvolution.
CS3: Curves and level adjustments, Carbonis Actions, GradientXterminator.

Comments:
Back to my polluted sky this faint nebula was difficult to capture with this small scope.