2040 Visibility Forecast
62
Visibility Score
14.7
Expected /hr
70.9%
Moon Illum.
poor
82.9°
Best Alt.
at 20:00
Radiant Altitude & Hourly Rate (Peak Night)
விளக்கம்
Medium strength shower with good rates for three nights around maximum. Can produce fireballs. Best from northern hemisphere at dawn.
வரலாறு
One of oldest known showers, Chinese records from 687 BC. Comet Thatcher orbital period ~415 years.
Radiant Position
Shower Properties
IAU CodeLYR
ClassMajor Shower
ZHR18
Velocity49.0 km/s
Speed ClassMedium (30-50 km/s)
Pop. Index (r)2.1
Radiant RA271.0°
Radiant Dec+33.6°
Peak Sol. Lng.32.32°
தாய் உடல்C/1861 G1 (Thatcher)
Parent Typecomet
Best Hemispherenorthern
2040 Dates
Activity StartApr 14
Activity EndApr 30
உச்ச தேதிApr 21
Moon PhaseWaxing Gibbous
Moon Condition
poor
Best Timepredawn
Characteristics
Moderate Rates