The Solar Longitude (Abbrev: S.L., λ ☉) is 33.6 degrees, this value is the the date of maximum activity. It is measured as a degree with zero degree indicating spring equinox (roughly March 21st/22nd). 90 is the Summer Solstice, 180 is the Autumn Equinox and 270 is the Winter Solstice. This degree is independent of the calender. AMS .
The source of the meteor shower is 26P/Grigg-Skjellerup. The closest star to the radiant point of the meteor shower is Ahadi. The coordinates can also be determined by the Right Ascension (110.4) and the Declination (-45.1).
The Zenith Hourly Rate or how many you expect to see during the hour is Var. The ZHR can radically increase if the comet or associated object is close by. The speed/velocity of the Meteor Shower particles is 15 km/s. The population index of the meteor shower is 2. The population index refers to the magnitude distribution of the meteorites, the smaller the index, the brighter the meteors are, the higher, the dimmer the meteors are. For this particular meteor shower, faint meteors are more frequent.
|Closest Star to Radiant Point||Ahadi|
|Max Activity Date||23 Apr|
|Activity Period||Apr 15 - Apr 28|
|Solar Longitude / λ ☉||33.6 °|
|Zenith Hourly Rate||Var|