Thread: Skycharts/Cartes 3 - Odd X-shapped pattern in PPMXL astro catalog
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Old 19-03-2011, 09:00 PM
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higginsdj
A Lazy Astronomer

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Join Date: Mar 2006
Location: Canberra
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They are quite common in a lot of catalogues and are the result of spurious identification of stars along the spikes of bright stars.

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