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Table 4

Orbits included in time interval 1.

Time interval 1

Year Orbit start end Orbit start end

2011 108 01:03:16:55 01:11:04:28 109 01:11:15:56 01:18:15:18
2010 60 01:02:18:14 01:10:00:21 61 01:10:11:00 01:17:15:36
2009 13 01:09:15:58 01:16:15:49

Notes. The start times of all orbits (month: day: hour: min) are approximately equal in the three successive years used in this analysis.

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