Open star cluster M11 contains an estimated 2.900 stars and lies at a distance of 6.200 light years.

The Wild Duck Cluster is one of the richest and most compact of the known open clusters, it was discovered in 1681.
Its age is estimated to be about 220 million years.

Other versions

Previous/older images:

Jul 15, 2006 – Canon 350D (8″ f4 GSO 40m)

Image data

Object info
Name M11 – The Wild Duck Cluster
Type Open cluster
Constellation Scutum
Right ascension 18h 51m 06s
Declination -06° 16′ 00″
Distance 6.200 ly
Other designations NGC6705
Image info
Image date Sep. 30, 2011
Light frames 18x 3 min. UHC-S unbinned
Total integration 54m
Dark frames 10x
Flat frames 10x p. filter unbinned, created with an A3 size Posterpoweruk flatfield panel
Bias frames 10x
Software used CCDOps, CCDSoft, ImagesPlus, Photoshop CS4
Processing CCDOPS was used for focussing. Image Acquisition was done using CCDSoft.
All separate frames were calibrated, aligned and stacked in MaxIm DL5 Pro.
Photoshop CS4 was used for further processing – curves adjustment, levels adjustment, etc.
Noel Carboni’s toolset was used as well (Local Contrast Enhancement, Deep Space Noise Reduction).
Equipment info
Telescope TMB/LOMO 80/480
Corrector Televue 2″ TRF 2008 flattener/reducer (FL: 384mm f/4.8)
Mount Losmandy G-11
Camera SBIG ST-8300M
Guide camera Atik 1HS Mono
Guide scope Vixen VMC110L
Autoguide software Guidemaster
Filters Baader 2″ UHC-S
Location Landgraaf, The Netherlands
Image comments

Quite humid conditions.