143-Gnosca

In December 2012, Marco Iten and me detected the 13^th lunar impact candidate. All detections were published in several issues of SELENOLOGY TODAY.

We begun our survey in 2009 and spent the first two years of searching without detections. We captured the first impact candidate when we modified our procedure of scanning and the aperture of one instrument. At the beginning of 2011 we changed from a 20cm to a 28cm Schmidt-Cassegrain telescope.

Our observatories are located 13km apart. Not very far, but enough to discriminate for possible glints of very high satellites.

When the phase of the Moon is good, we observe every possible evening/morning. We observed so far for 90 hours at the evening (past new moon) and for 114 hours at the morning (pre new moon). The rate of detected impact candidates at waxing is 1 every 10h; at waning 1 every 28h.

In several time windows we observed with only one instrument. In those periods we detected some candidates with the characteristics of true impacts but they were not confirmed by a second instrument. We saved those data for future analysis and possible crosschecks with other observers.

We couldn't reach our results without the valuable help of various people. Raffaello Lena, George Varros and Peter Gural. We thank them very warmly.

Our list of the impact candidates:

2012 December 16, 17:23:30UT (Report in Selenology Today 31)

2012 November 20, 16:59:28UT (Report in Selenology Today 31)

2012 March 28, 21:02:48UT (Report in Selenology Today 31)

2012 March 28, 18:29:56UT (Report in Selenology Today 31)

2012 February 26, 18:10:54UT (Report in Selenology Today 31)

2011 December 19, 02:27:45UT (Report in Selenology Today 28)

2011 November 21, 05:25:22UT (Report in Selenology Today 28)

2011 October 21, 04:32:34UT (Report in Selenology Today 25)

2011 October 21, 03:36:57UT (Report in Selenology Today 25)

2011 April 10, 19:47:02UT (Report in Selenology Today 24)