Meteoric activities during the 11th century

Details Meteoric activities during the 11th century Meteoric activities during the 11th century

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mnras.358.1105a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 358, Issue 4, pp. 1105-1115.

Astronomy and Astrophysics

Astronomy

2

Interplanetary Medium, Meteors, Meteoroids

Scientific paper

We have analysed the meteor records in the chronicles that describe the era of the Song dynasty (AD 960-1279). The data are complementary to the record-vacant 10th century of the Koryo dynasty (AD 918-1392). The annual activity of sporadic meteors analysed shows a generic sinusoidal behaviour as in modern observations. In addition, we have also found that there are two prominent meteor showers, one in August and the other in November, appearing on the fluctuating sporadic meteors. The date of occurrence of the August shower indicates it to be the Perseids. By comparing the date of occurrence of the November shower with those of the Leonid showers of the Koryo dynasty, recent visual observations and the world-wide historical meteor storms, we conclude that the November shower is the Leonids. The regression rate of the Leonids is obtained to be days per century, which agrees with recent observations.

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