Three open clusters in the same field in the constellation of Cassiopeia. Each is about 7 arc-minutes in diameter and they form a triangle about 11 arc-minutes on each side.
 |
NGC 146 is at the upper left, NGC 133 is at the upper right, and King 14 is at the bottom centre. (This picture is about 35 by 26 arc-minutes.) Their ages (in millions of years) and distances (in light years) are estimated to be
Date and Time: 10th November 2010 19.51 UT Camera: Starlight Xpress MX716 with Astronomik CLS filter Telescope: ETX125 with 0.33 focal reducer Capture: Star_mx7. Exposure 30 sec. Processing: Star_mx7: Enhancement factor 25, black level. Irfanview: Conversion to png format. RegiStax: Stacked 15 frames, wavelet 1 = 2. PhotImpact: Vertical flip, reduction to 88%, contrast and brighness +20 (to compensate for the reduction). |
||||||||||||||
Home Back to DSOs