The meteor shower occurs between July 23-August 22 with the peak occurring on the Aug. 12/13 every year.
The meteor shower peaks on the Aug. 12/13 every year.
The Solar Longitude (Abbrev: S.L., λ ☉) is 140 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 Comet 109P/Swift-Tuttle. The closest star to the radiant point of the meteor shower is Miram. The coordinates can also be determined by the Right Ascension (48.2) and the Declination (58.1).
The Zenith Hourly Rate or how many you expect to see during the hour is 100. The ZHR can radically increase if the comet or associated object is close by. The speed/velocity of the Meteor Shower particles is 59 km/s. The population index of the meteor shower is 3. 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, bright meteors are more frequent.
The Perseids are one of the brightest Meteor Showers in the year coupled with a high rate per hour which hopefully won't be a let down when they do come about. The Perseids are are associated with the Swift-Tuttle comet which is a mid-range comet, taking 133 years to complete its orbit. The Radiant Point location is Miram near the border with Cassiopeia who in the Grecian Legend is the mother of Andromeda who Perseus saved from being killed by Cetus.
Perseids should be visible as soon as it gets dark. Over the course of the night, the radiant point will reach higher into the sky. If there's no moon, it should be possible to view a meteor. The radiant point is halfway between Miram and CS Camelopardalis.
The more north you are, the better the chance you are able to see the Perseids. If you are in Sydney for example, the radiant point barely reaches the horizon and you would have to go somewhere with a great advantage point. If you move north to Darwin, you will be able to see the Perseids. The best time would be six o'clock in the morning when it is highest in the sky on the 13th of August. Any earlier than 3 a.m., you have no chance. The radiant point in located just inside the Cassioepeia constellation.
|Closest Star to Radiant Point||Miram|
|Peak Activity Date||Aug. 12/13|
|Activity Period||July 23-August 22|
|Solar Longitude / λ ☉||140 °|
|Zenith Hourly Rate||100|
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