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

Comet 41P/Tuttle-Giacobini-Kresak (41P), a Jupiter family comet with threediscoveries over about 100 years, is in a short-periodic orbit around the Sunwith the perihelion close to the Earth distance. The 2017 apparition of 41Poffered a long-lasting visibility of the comet at a close distance to Earth.The four month-long imaging campaign with the 2 m telescope at the MountWendelstein Observatory was aimed at characterizing dust activity and nucleusproperties of the comet. Using a new analysis method of the inner coma flux, wederived a small mean equivalent radius of about 600 m for the nucleus with anunusual body axes ratio that is higher than two. The nucleus rotation axis wasdetermined from the geometric appearance of coma structures, which wereenhanced in the images. A long-lasting coma fan was produced by an extendedregion at high latitudes on the slowly rotating nucleus, whereas isolated jetsoriginated from narrow, low latitude active regions on the nucleus. The dustactivity of 41P, despite being difficult to quantify exactly because of anunknown phase function correction for the comet, indicates a steep radialprofile that falls off with an increasing distance from the Sun. Colors andflux profiles provide evidence for dust fragmentation in the inner coma of thecomet. A singular outburst event created various dust structures in the coma.The outburst came from an extended region on the nucleus and was due to eithera landslide on the nucleus or a sudden material release from a subsurfacepocket of volatile ice.

Mt. Wendelstein imaging of comet 41P/Tuttle-Giacobini-Kresak during the 2017 perihelion arc