948221078 发表于 2008-12-28 11:19

Quadrantids (QUA)

Quadrantids (QUA)Active: January 1-5Maximum: January 3 12h50m UT (λo = 283°16)ZHR = 120 (can vary ~ 60-200)Radiant: α = 230° δ = +49°Radiant drift: see Table 6v∞ = 41 km/s; r = 2.1 at maximum (but variable)TFC: α = 242° δ = +75° and α = 198° δ = +40° (β > 40° N)IFC: before 0h local time α = 150° δ = +70°∞ after 0h local time α = 180° δ = +40° and α = 240° δ = +70° (β > 40° N)

zhl91 发表于 2008-12-28 11:35

这些数据是干什么的啊

zheng123 发表于 2008-12-28 12:53

948221078 发表于 2008-12-28 15:33

新年的象限仪座流星雨预报!
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