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| NGC 869 in Perseus ©Billy Vazquez @ VAO Webster, NY 9/18/2011 |
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| NGC 869 in BW ©Billy Vazquez @ VAO Webster, NY 9/18/2011 |
The Double Cluster are two open clusters in the constellation Perseus. The one in the images is NGC 869 at a distance of 7600 light years. It is believed it is about 13 million years old and it is also known as Cadwell 14.
The images were taken with the 12" SCT at f/6.3 with Astrodon Johnson VBR filters. Total exposure time was 2.5 hours. I am still using the Orion Parsec camera. In this instance I binned the image 2x2.
The mass of NGC 869 is estimated at 3700 solar masses with a color excess B-V of 0.56. Both clusters are near identical in age, distance and redenning. Whether the double cluster is the core of the Per OB1 association is still in debate according to Slesnick et al. 2002.
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