2017 Visibility Forecast
52
Visibility Score
30.9
Expected /hr
73.8%
Moon Illum.
poor
49.0°
Best Alt.
at 00:00
Radiant Altitude & Hourly Rate (Peak Night)
Açıklama
Strong from southern tropics. 10-30/hr from northern latitudes before dawn. Swift meteors with persistent trains, few fireballs. Good activity for a week.
Geçmiş
Produced by Halley's Comet debris. Shares parent with Orionids.
Radiant Position
Shower Properties
IAU CodeETA
ClassMajor Shower
ZSH50
Velocity65.4 km/s
Speed ClassSwift (>50 km/s)
Pop. Index (r)2.4
Radiant RA338.0°
Radiant Dec-1.0°
Peak Sol. Lng.45.5°
Ana Cisim1P/Halley
Parent Typecomet
Best Hemispheresouthern
2017 Dates
Activity StartApr 19
Activity EndMay 28
Zirve TarihiMay 06
Moon PhaseWaxing Gibbous
Moon Condition
poor
Best Timepredawn
Characteristics
Persistent Trains
Fast Meteors
Extended Activity