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CROSSWORD
ANSWER

zenithal

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The answer ZENITHAL has 2 possible clue(s) in existing crosswords.

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The word ZENITHAL is VALID in some board games. Check ZENITHAL in word games in Scrabble, Words With Friends, see scores, anagrams etc.

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Definitions of zenithal in various dictionaries:

adj - relating to or located at or near the zenith

adj - the highest point [n -S] : ZENITHAL

ZENITHAL - In astronomy, the zenithal hourly rate (ZHR) of a meteor shower is the number of meteors a single observer would see in an hour of peak activity, ass...

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Possible Crossword Clues
Top Buddhist I halt accidentally
Top tin Hazel removed

Last Seen in these Crosswords & Puzzles
Dec 10 2005 The Telegraph - Cryptic
Apr 24 2004 The Telegraph - Cryptic

Zenithal description
In astronomy, the zenithal hourly rate (ZHR) of a meteor shower is the number of meteors a single observer would see in an hour of peak activity, assumed the conditions are excellent (stars visible up to magnitude 6,5). The rate that can effectively be seen is nearly always lower and decreases the closer the radiant is to the horizon. * The formula to calculate the ZHR is:* * * * Z * H * R * = * * * * * * * * * * * * H * R * * ¯ * * * ⋅ * F * ⋅ * * r * * 6.5 * − * l * m * * * * * * * * * * * * sin * ⁡ * ( * h * R * ) * * * * * * * * {\displaystyle ZHR={\cfrac {{\overline {HR}}\cdot F\cdot r^{6.5-lm}}{\sin(hR)}}} * * where * * * * * * * * H * R * * ¯ * * * = * * * * * * * * * N * * * * * * * * * * * T * * e * f * f * * * * * * * * * * {\displaystyle {\overline {HR}}={\cfrac {N}{T_{eff}}}} * * represents the hourly rate of the observer. N is the number of meteors observed, and Teff is the effective observation time of the observer. * Example: If the observer detected 12 meteors in 15 minutes, their hourly rate was 48. (12 divided by 0.25 hours). * * * * * F * = * * * * * * * * * 1 * * * * * * * * * * 1 * − * k * * * * * * * * {\displaystyle F={\cfrac {1}{1-k}}} * * This represents the field of view correction factor, where k is the percentage of t...

Zenithal description

In astronomy, the zenithal hourly rate (ZHR) of a meteor shower is the number of meteors a single observer would see in an hour of peak activity, assumed the conditions are excellent (stars visible up to magnitude 6,5). The rate that can effectively be seen is nearly always lower and decreases the closer the radiant is to the horizon.
* The formula to calculate the ZHR is:*
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* {\displaystyle ZHR={\cfrac {{\overline {HR}}\cdot F\cdot r^{6.5-lm}}{\sin(hR)}}}
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* {\displaystyle {\overline {HR}}={\cfrac {N}{T_{eff}}}}
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* represents the hourly rate of the observer. N is the number of meteors observed, and Teff is the effective observation time of the observer.
* Example: If the observer detected 12 meteors in 15 minutes, their hourly rate was 48. (12 divided by 0.25 hours).
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* {\displaystyle F={\cfrac {1}{1-k}}}
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* This represents the field of view correction factor, where k is the percentage of t...

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