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Annual Variation List of Ursids

This page provides the list of Ursid annual variation using Radio Meteor Observation. Annnual variation graphs is also provided. Each year text connects to detail information of the year.

Observed Peak Times of Ursids

DateTime(UT)Solar LongitudeA(max)
2004 Dec. 22nd 12h(UT) 270°.949 0.60±0.44
2005 Dec. 22nd 00h(UT) 270°.683 0.45±0.25
2006 Dec. 22nd 15h(UT) 270°.550 0.59±0.31
2007 Dec. 22nd 19h(UT) 270°.459 0.55±0.35
2008 Dec. 22nd 03h(UT) 270°.532 0.67±0.26
2009 Dec. 22nd 08h(UT) 270°.487 0.77±0.26
2010 Dec. 22nd 15h(UT) 270°.521 0.49±0.22
2011 Dec. 21st 04h(UT) 268°.773 0.36±0.20(*)
2012 Dec. 22nd 07h(UT) 270°.682 0.53±0.28
2013 Dec. 22nd 07h(UT) 270°.415 0.29±0.22(*)
2014 Dec. 22nd 23h(UT) 270°.833 1.46±0.38
2015 Dec. 22nd 00h(UT) 270°.109 0.20±0.13(*)
2016 Dec. 22nd 10h(UT) 270°.779 1.03±0.30(*)
(*) these values mean usual activity level that is 0.0±0.4.

Estimated Acticvity Compornents of Ursids

DateComp.CodePeak Time(UT)Solar LongitudeA(max)FWHM
2004 URS04C01 Dec. 22nd 11:30 270°.906 0.4 -7.0 / +4.0
2005 URS05C01 Dec. 22nd 14:30 270°.768 0.3(*) -8.0 / +3.0
2006 URS06C01 Dec. 22nd 19:30 270°.720 0.5 -9.0 / +3.0
2007 URS07C01 Dec. 22nd 19:30 270°.459 0.5 -4.0 / +3.0
2008 URS08C01 Dec. 22nd 03:30 270°.532 0.5 -3.0 / +2.0
2009 URS09C01 Dec. 22nd 09:30 270°.529 0.6 -4.0 / +2.0
2010 URS10C01 Dec. 22nd 16:30 270°.563 0.6 -7.0 / +3.0
2011 URS11C01 Dec. 24th 03:30 271°.787 0.2(*) -3.0 / +3.0
2012 URS12C01 Dec. 22nd 05:30 270°.597 0.6 -4.0 / +4.0
2013 URS13C01 Dec. 22nd 07:30 270°.415 0.3(*) -1.0 / +1.0
2014 URS14C01 Dec. 23rd 00:30 270°.876 1.5 -1.0 / +1.0
2015 URS15C01 Dec. 22nd 22:30 270°.534 0.1(*) -6.0 / +6.0
2016 URS16C01 Dec. 22nd 10:30 270°.779 1.0 -2.0 / +4.0
(*) these values mean unusual activity level that are 0.0±0.4.