Author: Jakub Koukal

New meteor showers – yes or not?

Jakub Koukal¹ ¹ Valašské Meziříčí Observatory, Vsetínská 78, 75701 Valašské Meziříčí, Czech Republic j.koukal@post.cz Meteor astronomy is a very young branch of astronomy, its development began only 200 years ago. Even in the 18th century, there was a presumption that the meteors are present in the Earth’s atmosphere, that their origin is not extraterrestrial. There are more than 2500 years old observations of meteor showers (Lyrids meteor shower in 687 BC or Perseids in 36 AD), but science has not been interesting until the end of the 18th century. The great boom of meteoric astronomy occurred in the mid-20th...

Read More

R suite for analysis of the EDMOND database

This article presents the results of statistical analysis of the EDMOND database. The growing amount of data in the database requires effective tool for analysis and data management. This instrument is a library of scripts in the R language, developed by members of UKMON. Scripts allow elimination of bad data and efficient statistical analysis of the database. Introduction R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues....

Read More

CEMeNt 2016 – general overview

The Central European video Meteor Network (CEMeNt) established in 2010 is a platform for cross-border cooperation in the field of video meteor observations between Czech Republic and Slovakia. From the beginning the CEMeNt observational activities has been coordinated with professional Slovak Video Meteor Network (SVMN, [1]) as well as with other similar networks in area of central Europe (especially Hungarian Meteor Network, HMN [2] and Polish Fireball Network, PFN [3]). During six years of operation the CEMeNt network went through an extensive development. In total 33 video systems were working on 17 permanent stations located in Czech Republic and...

Read More

Spectra of slow bolides

In the period from late December to mid-April there is no activity of a significant meteor showers, with the exception of January Quadrantids. Total activity of the meteor showers is therefore very low and also sporadic background is at a minimum of its activity during the year. In that period are mostly active meteor showers belonging to the Antihelion source. From January to March prevails activity of the Virginid-Leonids complex, which is then transferred in April to the Scorpio-Sagittarids complex. The common characteristic of the meteors belonging to the Antihelion source is relatively low geocentric speed that for most...

Read More

Recording and comparison of the lightning spectrum

At the Valasske Mezirici Observatory are currently operating three cameras equipped with a spectroscopic system. The main goal of these cameras is recording the spectra of meteors and thus identify the chemical composition of meteoroids and also emission lines of elements contained in the Earth’s atmosphere. However, during the occurrence of storm activity the objective of the observations may change and spectrographs can record the spectra of electrostatic discharges – lightnings. This was also during a thunderstorm in the evening on June 19, 2016. Jakub Koukal¹, Martin Ferus², Libor Lenža¹ ¹ Valašské Meziříčí Observatory, Vsetínská 78, 75701 Valašské Meziříčí,...

Read More