Zenithal Hourly Rate
Noun
Meaning
Zenithal Hourly Rate (plural Zenithal Hourly Rates)
(astronomy) The number of meteors a single observer would see in one hour under a clear, dark sky (i.e. up to the limiting apparent magnitude of 6.5).
Noun
Zenithal Hourly Rate (plural Zenithal Hourly Rates)
(astronomy) The number of meteors a single observer would see in one hour under a clear, dark sky (i.e. up to the limiting apparent magnitude of 6.5).