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A Lunar Flash Likely Originated By Meteoroidal Impact

On August 1, 2013 at 02:21:55.7 UT, a small meteoroid has impacted the Moons surface. The kinetic energy transformed by the impact into thermal energy also caused a short and intense flash of light that was detected by telescopes of R. Lena, A. Manna and S. Sposetti.
The simultaneity of the flash and the same position on the lunar surface indicates it is an impact. The event described above has been observed by Raffaello Lena (GLR group, Rome Italy) with a refractor 130 mm and with a video camera Mintron. The flash was also detected by Andrea Manna from Cugnasco (Switzerlnd) with a Schmidt Cassegrain 200 mm and a camera watec
120N+. Stefano Sposetti (Gnosca, Switzerland) detected the flash using two telescopes: Refractor 150 mm and SC C11” equipped with watec 902H2 cameras.Two observatories in Switzerland are at a distance of 10.0 km. The observatory in Italy (Rome) is at a distance of 558 km from Gnosca (Switzerland). Time synchronicity of
the various files is assured by using a GPS time inserters (KIWI-OSD) and an Atomic Clock Synchronization protocol.
The meteoroidal lunar impact detected on August, 1, 2013 at 02:21:55.7 UT was simultaneously recorded by four independent video recordings. The duration of the flash correspond to 0.08s and reached a peak brightness of 8.3 ± 0.7 mag.
The selenographic coordinates of the lunar impact flash are determined to 73° ± 4° E and 27° ± 3° N, near the crater Seneca C. The examined impact flash probably corresponds to a α-Capricornids shower exhibiting favourable impact geometry on the impact date.
Enclosed an image of the detected lunar impact. A report of the observing session is published in Selenology Today 33

A pdf file can be also downloaded at the link

Some animations, and data, are also presented in my page web

Raffaello Lena

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