NGC 6905  -  Blue Flash Nebula

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Object data of NGC6905

Object type: Planetary nebula
Size: 1.2'
Magnitude: 10.9mag
Constellation: Del
Distance: 7,500 Ly
Notes: NGC 6905, also known as the Blue Flash Nebula, is a planetary nebula in the constellation Delphinus. The shape of NGC 6905 is characterised by an internal shell with angular dimensions 47"x 34" and roughly conical extensions along the major axis.

Exposure data

Date: 2023-09-04 until 2023-10-11 (7 nights)
Location: Nussbach / Austria (400m)
Telescope: TEC APO 200 FL with TEC flattener-reducer 0.9x (f=1500mm)
Camera: QHY 268M with Baader CMOS filters
Binning: L 1x1 / RGB 1x1
Mount: ASA DDM85
Exposure time: L 112x2min / RGB 48x2min each
Exposure time total: 8h 32min
Notes: Captured in nights with bright moon