α-Capricornids(CAP) 3 Ιουλίου-15 Αυ/στου"09 ΜΑΧ 30 Ιουλ

[Bi2L]

α-Capricornids(CAP) 2009

πηγη imo.net

http://www.imo.net/calendar/2009#julsep

Active: July 3-August 15

Maximum: July 30 (λo = 127°)

ZHR = 4

Radiant: α = 307° δ = -10°

Radiant drift: see Table 6

v∞ = 23 km/s; r = 2.5

TFC: α = 255° to 0° δ = 0° to +15°

choose pairs separated by about 30° in α (β < 40° N)

IFC: α = 300° δ = +10° (β > 45° N)

α = 320° δ = -05° (β=0° to 45° N)

α = 300° δ = -25° (β < 0°)

 

The CAP and SDA were both definitely detected visually in former years, standing out against the much weaker other radiants supposed active in Capricornus-Aquarius then. Whether the CAP can still be detected separately from the new ANT radiant area remains to be discovered, as its radiant now partly overlaps that of the large ANT oval region. The slightly slower speed of the α-Capricornids compared to the ANT may help distinguish them from the ecliptical background.} In their favour, CAP meteors are noted for being bright, at times even of fireball-class, which, combined with their low apparent velocity, can make some of these objects among the most impressive and attractive an observer could wish for. A minor enhancement of CAP ZHRs to ~ 10 was noted in 1995 by European IMO observers. More recent results suggest the maximum may continue for an extra day, so perhaps from July 30-31 this year. The waxing gibbous Moon sets somewhat later for this interval than for the PAU and SDA, even so, between roughly 23h-3h (again, later moonsets occur at more southerly latitudes).

 

 

Δειτε και τον Ετησιο Πινακα Διαττοντων 2009 για περισσοτερες Βροχες!

 

α-Capricornids(CAP) 2009