M 15

Full resolution (1600x1200 px  510kB)

150% resolution (900kB)

Inverted image (800kB)

Object data of M15

Object type: globular cluster (IV)
Size: 12.3'
Magnitude: 6.2 mag
Constellation: Peg
Distance: 33,000 Ly

The inverted image shows  faint nebulae. This nebulae are probably galactic cirrus, because the brightness of the nebula is similar in Red, Green and Blue.

Exposure data

Date: 2009-08-14 + 15
Location: Nussbach / Austria (400m)
Telescope: TeleVue NP101 (4" Apo f=540mm)
Camera: ST2000XM with CFW8 and Baader Filters
Binning: L 1x1 / RGB 1x1
Exposure time: L 64x2m / R 20x5m / G 20x5m / B 20x5m
Exposure time total: 7h 08m
Notes: Drizzle for 150% size