Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Zenithal_Hourly_Rate> ?p ?o. }
Showing items 1 to 43 of
43
with 100 items per page.
- Zenithal_Hourly_Rate abstract "In astronomy, the Zenithal Hourly Rate (ZHR) of a meteor shower is the number of meteors a single observer would see in one hour under a clear, dark sky (limiting apparent magnitude of 6.5) if the radiant of the shower were at the zenith. 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:whererepresents 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).This represents the field of view correction factor, where k is the percentage of the observer's field of view which is obstructed (by clouds, for example).Example: If 20% of the observer's field of view were covered by clouds, k would be 0.2 and F would be 1.25. The observer should have seen 25% more meteors, therefore we multiply by F = 1.25.This represents the limiting magnitude correction factor. For every change of 1 magnitude in the limiting magnitude of the observer, the number of meteors observed changes by a factor of r. Therefore we must take this into account.Example: If r is 2, and the observer's limiting magnitude is 5.5, we will have to multiply their hourly rate by 2 (2 to the power 6.5-5.5), to know how many meteors they would have seen if their limiting magnitude was 6.5.This represents the correction factor for altitude of the radiant above the horizon (hR). The number of meteors seen by an observer changes as the sine of the radiant height in radians.Example: If the radiant was at an average altitude of 30° during the observation period, we will have to divide the observer's hourly rate by 0.5 (sin 30°) to know how many meteors they would have seen if the radiant was at the zenith.".
- Zenithal_Hourly_Rate thumbnail AGOModra_Leonids98.jpg?width=300.
- Zenithal_Hourly_Rate wikiPageExternalLink guidechap8.html.
- Zenithal_Hourly_Rate wikiPageID "205558".
- Zenithal_Hourly_Rate wikiPageRevisionID "589985549".
- Zenithal_Hourly_Rate hasPhotoCollection Zenithal_Hourly_Rate.
- Zenithal_Hourly_Rate subject Category:Meteoroids.
- Zenithal_Hourly_Rate subject Category:Observational_astronomy.
- Zenithal_Hourly_Rate type ExtraterrestrialObject109277686.
- Zenithal_Hourly_Rate type Meteoroid109353109.
- Zenithal_Hourly_Rate type Meteoroids.
- Zenithal_Hourly_Rate type NaturalObject100019128.
- Zenithal_Hourly_Rate type Object100002684.
- Zenithal_Hourly_Rate type PhysicalEntity100001930.
- Zenithal_Hourly_Rate type Whole100003553.
- Zenithal_Hourly_Rate comment "In astronomy, the Zenithal Hourly Rate (ZHR) of a meteor shower is the number of meteors a single observer would see in one hour under a clear, dark sky (limiting apparent magnitude of 6.5) if the radiant of the shower were at the zenith. 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:whererepresents the hourly rate of the observer.".
- Zenithal_Hourly_Rate label "Tasa Horaria Zenital".
- Zenithal_Hourly_Rate label "Tasso orario zenitale".
- Zenithal_Hourly_Rate label "Taux horaire zénithal".
- Zenithal_Hourly_Rate label "Taxa horária zenital".
- Zenithal_Hourly_Rate label "Zenitalna liczba godzinna".
- Zenithal_Hourly_Rate label "Zenithal Hourly Rate".
- Zenithal_Hourly_Rate label "Zenithal Hourly Rate".
- Zenithal_Hourly_Rate label "Zenithal hourly rate".
- Zenithal_Hourly_Rate label "Зенитное часовое число".
- Zenithal_Hourly_Rate label "天頂出現数".
- Zenithal_Hourly_Rate label "每小時天頂流星數".
- Zenithal_Hourly_Rate sameAs Zenithal_Hourly_Rate.
- Zenithal_Hourly_Rate sameAs Tasa_Horaria_Zenital.
- Zenithal_Hourly_Rate sameAs Taux_horaire_zénithal.
- Zenithal_Hourly_Rate sameAs Tasso_orario_zenitale.
- Zenithal_Hourly_Rate sameAs 天頂出現数.
- Zenithal_Hourly_Rate sameAs 정점_시율.
- Zenithal_Hourly_Rate sameAs Zenithal_hourly_rate.
- Zenithal_Hourly_Rate sameAs Zenitalna_liczba_godzinna.
- Zenithal_Hourly_Rate sameAs Taxa_horária_zenital.
- Zenithal_Hourly_Rate sameAs m.01d4m4.
- Zenithal_Hourly_Rate sameAs Q189623.
- Zenithal_Hourly_Rate sameAs Q189623.
- Zenithal_Hourly_Rate sameAs Zenithal_Hourly_Rate.
- Zenithal_Hourly_Rate wasDerivedFrom Zenithal_Hourly_Rate?oldid=589985549.
- Zenithal_Hourly_Rate depiction AGOModra_Leonids98.jpg.
- Zenithal_Hourly_Rate isPrimaryTopicOf Zenithal_Hourly_Rate.
