NGC 6910

Alt. Designations: NGC 6910
Object Type: open cluster
Constellation: Cygnus
Distance: 5 kly
Right Ascension: 20h 23m 12.0s
Declination: +40° 46´ 43"
Visual Magnitude: 7.4
Apparent Dimension: 10.0´ Dia.
Best Month To View: Jul

 This tinny little object is also known as the Rocking Horse cluster. It's special features are the two brightest stars of the cluster (at the front leg and the eye), that are apparently yellow, even though their spectral class suggests a rather white color. This optical illusion is caused by the interstellar dust that is so common through Cygnus.