NGC457 Open cluster - OWl, E.T.
NGC 457 is an open star cluster in the constellation Cassiopeia. It was discovered by William Herschel in 1787 and lies over 7,900 light years away from the Earth. It has an estimated age of 21 million years. Also known as the Owl Cluster, the ET Cluster, or Caldwell 13.
Photo Details
Telescope: FSQ106EDX (530 mm) Takahashi
Camera: Sbig ST-8300M, Sbig Filter wheel, Baader 36mm round HLRGB filters
Mount: Takahashi NJP
Guiding: Off-axis, Orion SS Autoguider
Exposure: LRGB L 7x300sec, R 5x300sec, G 5x300sec, B 5x300sec
When: October 2013
Other information: Very good seeing and transpatrency