An eclipse in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the Moon's orbit.[3] Solar eclipse series sets from 2008–2011 Ascending node Descending node Saros Map Gamma Saros Map Gamma 121 Partial from Christchurch, NZ 2008 February 07 Annular -0.9570 126 Novosibirsk, Russia 2008 August 01 Total 0.8307 131 Partial from Riversdal 2009 January 26 Annular -0.2819 136 Kurigram, Bangladesh 2009 July 22 Total 0.0698 141 Bangui, Central African Republic 2010 January 15 Annular 0.4002 146 Hao, French Polynesia 2010 July 11 Total -0.6787 151 Partial from Vienna, Austria 2011 January 04 Partial (north) 1.0626 156 2011 July 01 Partial (south) -1.4917 Partial solar eclipses on June 1, 2011, and November 25, 2011, occur on the next lunar year eclipse set.