The Wild Duck Cluster, also known as Messier 11, and NGC 6705, is an open cluster of stars in the constellation Scutum. It was discovered by Gottfried Kirch in 1681. Charles Messier included it in his catalogue of diffuse objects in 1764. Its popular name derives from the brighter stars forming a triangle which could resemble a flying flock of ducks. The cluster is located just to the east of the Scutum Star Cloud midpoint.
The Wild Duck Cluster is one of the richest and most compact of the known open clusters. It is one of the most massive open clusters known, and it has been extensively studied. Its age has been estimated to about 316 million years. The core radius is 1.23 pc (4.0 ly) while the tidal radius is 29 pc (95 ly). Estimates for the cluster’s mass range from 3,700 M☉[8] to 11,000 M☉,[4] depending on the method chosen. The brightest cluster member is visual magnitude 8, and it has 870 members of at least magnitude 16.5. It has an integrated absolute magnitude of –6.5, and a visual extinction of 1.3.
Object Designations: Messier 11, NGC 6705
Also known as: Wild Duck Cluster
Constellation: Scutum
Object Type: Open Cluster
Distance: 6.120 light-years away
Magnitude: 5.8
Discovery: Gottfried Kirch in 1681
This final image is:
12 – 30 second subs at 100 gain – no filter about 10 minutes of integration
I processed the images using Pixinsight using:
Weighted Batch Balance
SpectroPhotometricCalibration
AutomaticBackgroundExtractor
BlurExterminator
NoiseExterminator
EZProcessing Suite Softstretch
ColorCalibration
Curves
