Stefan Schröder
A5000559606- Astro and Planetary Science
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Stellar, planetary, and galactic studies
- Space Exploration and Technology
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Microgrid Control and Optimization
- Islanding Detection in Power Systems
- Geophysics and Gravity Measurements
- Astronomical Observations and Instrumentation
- Marine and environmental studies
- Urban and Freight Transport Logistics
- Methane Hydrates and Related Phenomena
- History and Developments in Astronomy
- Space Science and Extraterrestrial Life
- Atmospheric Ozone and Climate
- Spaceflight effects on biology
- Geological formations and processes
- Transportation Planning and Optimization
- Astrophysics and Star Formation Studies
- Aeolian processes and effects
Kiel University
2022-2024
Luleå University of Technology
2022-2024
California Maritime Academy
2024
Danfoss (Germany)
2022-2023
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2013-2022
Volkswagen Group (Germany)
2022
Fachhochschule Kiel
2022
Planet
2015-2021
Dienstleistungszentrum Ländlicher Raum
2020-2021
TU Dortmund University
2017
Hayabusa2 at the asteroid Ryugu Asteroids fall to Earth in form of meteorites, but these provide little information about their origins. The Japanese mission is designed collect samples directly from surface an and return them for laboratory analysis. Three papers this issue describe team's study near-Earth carbonaceous 162173 Ryugu, which spacecraft arrived June 2018 (see Perspective by Wurm). Watanabe et al. measured asteroid's mass, shape, density, showing that it a “rubble pile” loose...
Context. The complex shape of comet 67P and its oblique rotation axis cause pronounced seasonal effects. Irradiation hence activity vary strongly.
Butterflies are a diverse and charismatic insect group that thought to have evolved with plants dispersed throughout the world in response key geological events. However, these hypotheses not been extensively tested because comprehensive phylogenetic framework datasets for butterfly larval hosts global distributions lacking. We sequenced 391 genes from nearly 2,300 species, sampled 90 countries 28 specimen collections, reconstruct new phylogenomic tree of butterflies representing 92% all...
Samples of the carbonaceous asteroid (162173) Ryugu were collected and brought to Earth by Hayabusa2 spacecraft. We investigated macromolecular organic matter in samples found that it contains aromatic aliphatic carbon, ketone, carboxyl functional groups. The spectroscopic features are consistent with those chemically primitive chondrite meteorites experienced parent-body aqueous alteration (reactions liquid water). morphology carbon includes nanoglobules diffuse associated phyllosilicate...
A New Dawn Since 17 July 2011, NASA's spacecraft has been orbiting the asteroid Vesta—the second most massive and third largest in solar system (see cover). Russell et al. (p. 684 ) use Dawn's observations to confirm that Vesta is a small differentiated planetary body with an inner core, represents surviving proto-planet from earliest epoch of formation; also confirmed as source howardite-eucrite-diogenite (HED) meteorites. Jaumann 687 report on asteroid's overall geometry topography, based...
We collect observational evidence that supports the scheme of mass transfer on nucleus comet 67P/Churyumov-Gerasimenko. The obliquity rotation axis 67P causes strong seasonal variations. During perihelion southern hemisphere is four times more active than north. Northern territories are widely covered by granular material indicates back fall originating from south. Decimetre sized chunks contain water ice and their trajectories influenced an anti-solar force instigated sublimation. OSIRIS...
Landing on the surface of Ryugu In October 2018, Hayabusa2 spacecraft dropped Mobile Asteroid Surface Scout (MASCOT) lander onto asteroid (162173) Ryugu. Jaumann et al. analyzed images taken by MASCOT camera during its descent and when resting surface. Colored light-emitting diodes were used to illuminate lander's surroundings at night produce color images. Ryugu's is dominated two types rock, but there no evidence for fine-grained dust. Millimeter-sized inclusions in rocks are similar those...
The structure of the upper layer a comet is product its surface activity. Rosetta Lander Imaging System (ROLIS) on board Philae acquired close-range images Agilkia site during descent onto 67P/Churyumov-Gerasimenko. These reveal photometrically uniform covered by regolith composed debris and blocks ranging in size from centimeters to 5 meters. At highest resolution 1 centimeter per pixel, appears granular, with no apparent deposits unresolved sand-sized particles. thickness varies across...
The European Space Agency's Rosetta mission encountered the main-belt asteroid (2867) Steins while on its way to rendezvous with comet 67P/Churyumov-Gerasimenko. Images taken OSIRIS (optical, spectroscopic, and infrared remote( )imaging system) cameras board show that is an oblate body effective spherical diameter of 5.3 kilometers. Its surface does not color variations. morphology dominated by linear faults a large 2.1-kilometer-diameter crater near south pole. Crater counts reveal distinct...
Abstract Ceres has only a small spin axis tilt (4°), and craters near its rotational poles can experience permanent shadow trap volatiles, as is the case on Mercury Earth's Moon. Topography derived from stereo imaging by Dawn spacecraft used to calculate direct solar irradiance that defines extent of permanently shadowed regions (PSRs). In northern polar region, PSRs cover ∼1800 km 2 or 0.13% hemisphere, most are cold enough water ice over geological time periods. Based modeling exosphere,...
Context. The Hayabusa2 spacecraft launched by Japan Aerospace Exploration Agency has been conducting observations of the asteroid (162173) Ryugu since June 2018. Telescopic Optical Navigation Camera (ONC-T) onboard obtained thousands images under a variety illumination and viewing conditions. Aims. Our objective is to examine validate camera calibration, derive photometric correction for creating global albedo maps, interpret modeling results characterize surface Ryugu. Methods. We observed...
Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA). Ground-based observations indicate that a C-type near-Earth with diameter less than 1 km, but knowledge its detailed properties very limited prior to Hayabusa2 observation. This paper summarizes our best understanding physical dynamical based on ground-based remote sensing theoretical modeling before Hayabusa2's arrival at asteroid....
Abstract The first ever regional thermal properties map of Vesta has been derived from the temperatures retrieved by infrared data mission Dawn. low average value inertia, 30 ± 10 J m −2 s −0.5 K −1 , indicates a surface covered fine regolith. A range inertia values suggesting terrains with different physical determined. lower regions north equator suggests that they are an older, more processed surface. few specific areas have higher than values, indicative compact material. highest...