当晚活动的流星群
Quadrantids (QUA)
Active: January 1 —5; Maximum: January 3, 18h20m UT (λ = 283°16);
ZHR = 120 (can vary ~ 60 —200);
Radiant: α = 230°, δ = +49°; Radiant drift: see Table 6 (page 23);
v∞ = 41 km/s; r = 2.1 at maximum, but variable;
TFC: α = 242°, δ = +75° and α = 198°, δ = +40° (β > 40° N).
PFC: before 0h local time α = 150°, δ = +70°;
after 0h local time α = 180°, δ = +40° and
α = 240°, δ = +70° (β > 40° N).
当晚赤经赤纬:230 +50
Coma Berenicids(COM)
当晚赤经赤纬:188 +19
δ-Cancrids(DCA)
当晚赤经赤纬:114 +22 |