Comet C/2017 O1 ASASSN
Taken by José J. Chambó on September 18, 2017 @ Valencia, Spain
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Comet C/2017 O1 ASASSN photographed on September 18th 2017. Comparing this image with I took a month ago is seen as have increased the apparent size of its greenish coma from 7 to 10, and the lenght of its ionic tail from 10 to 20. Its brightness has slightly increased on same time from magnitude 9 to 8.5 approximately. The brightest star in field is 37 Tauri with magnitude 4,4.

GSO 8 760mm. f/3.8 & Atik 383L+
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