2018 Visibility Forecast
99
Visibility Score
95.0
Expected /hr
0.0%
Moon Illum.
excellent
71.8°
Best Alt.
at 22:00
Radiant Altitude & Hourly Rate (Peak Night)
விளக்கம்
Most popular meteor shower, peaking on warm August nights. Rural rates 50-100/hr at maximum. Swift with persistent trains and bright meteors.
வரலாறு
First recorded 36 AD by Chinese astronomers. Comet 109P/Swift-Tuttle period ~133 years, last perihelion 1992.
Radiant Position
Shower Properties
IAU CodePER
ClassMajor Shower
ZHR100
Velocity59.0 km/s
Speed ClassSwift (>50 km/s)
Pop. Index (r)2.2
Radiant RA48.0°
Radiant Dec+58.1°
Peak Sol. Lng.140.0°
தாய் உடல்109P/Swift-Tuttle
Parent Typecomet
Best Hemispherenorthern
2018 Dates
Activity StartJul 17
Activity EndAug 24
உச்ச தேதிAug 11
Moon PhaseNew Moon
Moon Condition
excellent
Best Timeafter_midnight
Characteristics
Popular
Summer Viewing
Fast Meteors
Persistent Trains
Bright Meteors