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Agora – Historical space weather events and observations

Fig. 6

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Calculated cometary tails during nights of (a) 837 April 10/11 (April 11, 01:00 LMT) and (b) 837 April 11/12 (April 12, 0:00 LMT) with Stella Navigator 11 using orbit element in Marsden & Williams (2008) and Yeomans & Kiang (1981). During the night of April 10/11, 837, its dust tail (white) was shown directed towards Fáng (π Sco, ρ Sco, δ Sco, and β Sco) and its plasma tail (blue) directed towards α Lib in the western part of .

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