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What is ZHR ?

Zenithal Hourly Rate

Hourly rate (ZHR) is one of the concept of astronomy.

hourly rate i.e. the number of meteors that in the event of the epicenter of the meteor in Sorso in place, the horizon is quite open and smooth, and the limit of magnitude 6. the 5 during one hour with the eye, instruments .

define hourly rate is a little complex, but to obtain scientific information accurate from the situation of rainfall, meteor shower it is necessary.
ZHR