The Solar Longitude (Abbrev: S.L., λ ☉) is 45.5 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 Eta Aquarids are a meteor Shower centred close to the bright star that is known by some as Hydria. Hydria is also known as Eta Aquarii hence why the meteor shower is known as it is. The meteor shower is associated with the most famous comet of them all, Halleys Comet. As such, the Eta Aquariids are spectacular when the comet reaches close to the sun.
The meteors are best seen in the Equatorial zone and in the southern hemisphere. For those in the Northern hemisphere, you might be able to see them close to the horizon. If thats disappointing, not to worry, there are other meteor showers out there that will be of interest.
The source of the meteor shower is Comet Halley. The coordinates can also be determined by the Right Ascension (338) and the Declination (-1).
The Zenith Hourly Rate or how many you expect to see during the hour is 85. The ZHR can radically increase if the comet or associated object is close by. The speed/velocity of the Meteor Shower particles is 66 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.
|Max Activity Date||06 May|
|Activity Period||April 21-May 12|
|Solar Longitude / λ ☉||45.5 °|
|Zenith Hourly Rate||85|