K. N. Burke
A5036355718- Planetary Science and Exploration
- Astro and Planetary Science
- Isotope Analysis in Ecology
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Gamma-ray bursts and supernovae
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Marine and environmental studies
- Fluid Dynamics Simulations and Interactions
- Geological formations and processes
- Nuclear Physics and Applications
- Geological and Geophysical Studies
- Landslides and related hazards
- Pulsars and Gravitational Waves Research
- Space Satellite Systems and Control
- High-Velocity Impact and Material Behavior
- Geological Studies and Exploration
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Seismic Waves and Analysis
- Astrophysical Phenomena and Observations
- Spacecraft and Cryogenic Technologies
- Bluetooth and Wireless Communication Technologies
Planetary Science Institute
2018-2023
University of Arizona
2018-2023
Jet Propulsion Laboratory
2002
Heterogeneous thermal properties of Bennu are due primarily to spatial mixing two boulder types with differing strengths.
Visible-wavelength color and reflectance provide information about the geologic history of planetary surfaces. Here we present multispectral images (0.44 to 0.89 micrometers) near-Earth asteroid (101955) Bennu. The surface has variable colors overlain on a moderately blue global terrain. Two primary boulder types are distinguishable by their texture. Space weathering Bennu materials does not simply progress from red (or vice versa). Instead, freshly exposed, redder surfaces initially...
The composition of asteroids and their connection to meteorites provide insight into geologic processes that occurred in the early Solar System. We present spectra Nightingale crater region on near-Earth asteroid Bennu with a distinct infrared absorption around 3.4 micrometers. Corresponding images boulders show centimeters-thick, roughly meter-long bright veins. interpret veins as being composed carbonates, similar those found aqueously altered carbonaceous chondrite meteorites. If are...
We manually mapped particles ranging in longest axis from 0.3 cm to 95 m on (101955) Bennu for the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) asteroid sample return mission. This enabled mission identify candidate collection sites shed light processes that have shaped surface of this rubble-pile asteroid. Building a global survey particles, we used higher-resolution data regional observations calculate particle size-frequency...
This paper summarizes the evidence for optical effects of space weathering, as well properties surface that control changes, on asteroid (101955) Bennu. First, we set stage by briefly reviewing what was known about weathering low-albedo materials from telescopic surveys, laboratory simulations, and sample return analysis. We then look at nature Bennu recent spacecraft imaging spectroscopy observations, including visible to near-infrared thermal infrared wavelengths, followed other...
Abstract Near‐Earth asteroid (101955) Bennu is an active experiencing mass loss in the form of ejection events emitting up to hundreds millimeter‐ centimeter‐scale particles. The close proximity Origins, Spectral Interpretations, Resource Identification, and Security–Regolith Explorer spacecraft enabled monitoring particles for a 10‐month period encompassing Bennu's perihelion aphelion. We found 18 multiparticle events, with masses ranging from near zero grams (or thousands uncertainties)...
Abstract The OSIRIS‐REx Asteroid Sample Return Mission is the third mission in National Aeronautics and Space Administration (NASA)'s New Frontiers Program first U.S. to return samples from an asteroid Earth. most important decision ahead of team selection a prime sample‐site on surface (101955) Bennu. success hinges identifying site that safe has regolith can readily be ingested by spacecraft's sampling mechanism. To inform this mission‐critical decision, Bennu mapped using Camera Suite...
A small number of anomalously bright boulders on the near-Earth, rubble-pile asteroid (101955) Bennu were recently identified as eucritic material originating from (4) Vesta. Building this discovery, we explored global presence exogenic Bennu. Our analysis focused larger than 1 m that show characteristic 1-micron pyroxene absorption band in four-color MapCam data OSIRIS-REx mission. We confirm similar to eucrites and find mixtures with carbonaceous is also a possible composition for some...