English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We observed the predicted outburst of the Alpha Monocerotid (AMO) meteorshower on 2019 November 22 with our modernized video and photographic cameras.Due to the short duration and moderate intensity of the outburst, atmospherictrajectories and radiants were obtained for only ten meteors, seven of whichincluded velocities, magnitudes, and orbits. In addition, one incomplete videospectrum was captured. The radiants and orbits were found to be compatible withthat of the 1995 outburst. The spectrum confirmed that AMO meteoroids aredeficient in sodium. Unlike any other meteor shower, meteor end heights werefound to be distributed along a constant level of 90 km for all meteors withmagnitudes between +4 and -2 and with atmospheric trajectory lengths up to 40km. We propose that Alpha Monocerotids were formed from a devolatilized andfragile cometary crust composed from relatively large fundamental grains.

Properties of Alpha Monocerotid meteors from the observation of the 2019 outburst in the Czech Republic