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Planetary Nebula M27 (NGC 6853, Dumbbell nebula), type 3a+2, in Vulpecula

Ha-OIII-LRGB combination (Click for a larger view 1300 x 1300 px)

 

LRGB combination (Click for a larger view 1800 x 1800 px)

Details

Planetary Nebula M27 (NGC 6853, Dumbbell nebula), type 3a+2, in Vulpecula

Probably discovered by Hodierna before 1654. Independently discovered by Charles Messier 1764.

Right Ascension 19 : 59.6 (h:m)
Declination +22 : 43 (deg:m)
Distance 1.25 (kly)
Visual Brightness 7.4 (mag)
Apparent Dimension 8.0 x 5.7 (arc min)

Seeing: Pickering 8 rating - Good to Excellent
Optic(s): Celestron 11" Schmidt Cassegrain + Alan Gee II telecompressor @ f/6.3
Mount: CGE equatorial
Camera: Artemis Art 4021 - monochrome cooled CCD camera – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomics Ha, OIII, L, R, G, B set, SupaSlim TrueTechnology Computerized Filter Wheel
Dates/Times: 2011-08-01 UT 22:20:51
Location: Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

Ha = 30 min, Oiii = 30 min, L = 30 min, R = 30 min, G = 30 min, B = 30 min, (Bin1), Subexposures Ha, OIII = 10 min, LRGB = 5 min, Total Exposure Time - 180 min

More details: Dark frames reduction
Guiding: Starlight Xpress Lodestar Autoguider on APO 90/600+barlow @ f/13.4
Processing:

PixInsight / PS

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