Comet C/2017 O1 ASASSN photographed on September 18th, 2017. Compared to the image which I took a month ago, it seems to me that the apparent size of its greenish coma has increaed from 7' to 10', and the length of its ionic tail from 10' to 20'. Its brightness has slightly increased on the same time from magnitude 9 to 8.5 approximately. The brightest star in field is 37 Tauri with magnitude 4,4.
Daten zum Bild
|Zeitpunkt||18.09.2017 04:24 UT|
|Teleskop/Objektiv||GSO 8" f/3.8|
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