zenith hourly rate

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• Zenith Hourly Rate — is a concept used by meteor shower observers. It represents the maximum theoretical rate of meteors that would be visible to an observer, if the radiant of the shower was at the zenith and the sky was free of any light pollution. Because the ZHR… …   Wikipedia

• Zenithal Hourly Rate — In astronomy, the Zenithal Hourly Rate (ZHR) of a meteor shower is the number of meteors an observer would see in one hour under a clear, dark sky (limiting apparent magnitude of 6.5) and if the radiant of the shower were in the zenith. The rate… …   Wikipedia

• List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …   Wikipedia

• ZHR — Zenithal Hourly Rate (Academic & Science » Meteorology) * Zenith Hourly Rate (Business » General) …   Abbreviations dictionary

• Southern Delta Aquariids — The Southern Delta Aquariids[1] are a meteor shower visible from mid July to mid August each year with peak activity on July 28 or 29 July. The shower originated from the breakup of what are now the Marsden and Kracht Sungrazing comets.[2] The… …   Wikipedia

• Meteor shower — This article is about the falling of meteors. For the TV program, see Meteor Shower (TV series). A meteor shower is a celestial event in which a number of meteors are observed to radiate from one point in the night sky. These meteors are caused… …   Wikipedia

• June Bootids — The June Bootids are a meteor shower occurring roughly between 26 June and 2 July each year. In most years their activity is weak, with a zenith hourly rate (ZHR) of only 1 or 2. However, occasional outbursts have been seen, with the outburst of… …   Wikipedia

• Bootides de juin — Les Bootides de juin sont une pluie de météores survenant approximativement entre le 26 juin et le 2 juillet chaque année. La plupart des années leur activité est faible, avec un taux horaire zénithal (en anglais Zenith Hourly Rate ou ZHR) de… …   Wikipédia en Français

• ZHR — abbr. Zenith Hourly Rate …   Dictionary of abbreviations

• EZHR — Estimated Zenithal Hourly Rate geschätzte Rate eines Sternenschnuppenstroms von Erscheinungen pro Stunde, wenn der Radiant im Zenith stände Astronomie …   Acronyms

• ZHR — Zenithal Hourly Rate Rate eines Sternenschnuppenstroms von Erscheinungen pro Stunde, wenn der Radiant im Zenith stände Astronomie …   Acronyms