2047 Napoved vidljivosti
81
Ocena vidljivosti
17.9
Pričakovano /h
8.4%
Osvetl. Lune
excellent
83.0°
Najb. višina
at 20:00
Višina radianta in urna stopnja (noč vrha)
Opis
Medium strength shower with good rates for three nights around maximum. Can produce fireballs. Best from northern hemisphere at dawn.
Zgodovina
One of oldest known showers, Chinese records from 687 BC. Comet Thatcher orbital period ~415 years.
Položaj radianta
Lastnosti roja
Koda IAULYR
RazredMajor Shower
ZHR18
Hitrost49.0 km/s
Razred hitrostiMedium (30-50 km/s)
Pop. indeks (r)2.1
RA radianta271.0°
Dek. radianta+33.6°
Vrh. sol. dolžina32.32°
Matično teloC/1861 G1 (Thatcher)
Vrsta matičnega telesacomet
Najboljša poloblanorthern
2047 Datumi
Začetek aktivnostiApr 14
Konec aktivnostiApr 30
Datum vrhaApr 22
Lunina fazaWaxing Crescent
Stanje Lune
excellent
Najboljši časpredawn
Značilnosti
Moderate Rates