All-Sky Video Orbits of Lyrids 2009

We report observational results of the Lyrid meteor shower observed by the double station all-sky video system in the night of April 21/22, 2009 at the Astronomical and Geophysical Observatory of the Comenius University in Modra and Arboretum, Tes\'arske Mly\v{n}any, Slovakia. This observation was the first test of the double stations and orbit determination method within the frame of the new Slovak Video Meteor Network (SVMN). We present the whole set of 17 observed orbits of Lyrids as well as the five most precise orbits in detail form. The comparison with the known datasets, precise photographic IAU MDC and SonotaCo video orbits, demonstrate quite good consistency and similar quality.Comment: 4 pages, 3 figures, 2 table

Density, porosity and magnetic susceptibility of the Košice meteorite shower and homogeneity of its parent meteoroid

Bulk and grain density, porosity, and magnetic susceptibility of 67 individuals of Košice H chondrite fall were measured. The mean bulk and grain densities were determined to be 3.43 g/cm3 with standard deviation (s.d.) of 0.11 g/cm3 and 3.79 g/cm3 with s.d. 0.07 g/cm3, respectively. Porosity is in the range from 4.2 to 16.1%. The logarithm of the apparent magnetic susceptibility (in 10−9 m3/kg) shows narrow distribution from 5.17 to 5.49 with mean value at 5.35 with s.d. 0.08. These results indicate that all studied Košice meteorites are of the same composition down to ∼g scale without presence of foreign (non-H) clasts and are similar to other H chondrites. Košice is thus a homogeneous meteorite fall derived from a homogenous meteoroid.Peer reviewe

MIESTO ANALÓGIE VO VYVINE SLOVENÚINY

La caracterización de la analogía en una lengua debe basarse en tantas cualidades de los elementos comparados como fuere posible y las relaciones entre esas cualidades y las cualidades de otros elementos deberían ser lo más cercanas posible aunque esto no tiene que cubrir todas sus cualidades y relaciones. En un intento por caracterizar la lengua eslovaca se debería buscar también la correspondencia de los elementos individuales así como sus diferencias, explicando las razones de éstas