Gefahr erkannt, Gefahr gebannt? Astronomische Beobachtung von Kleinkörpern im Sonnensystem (2008)
Nach unseren derzeitigen Kenntnissen ist die Sonne aus dem Gas und Staub einer Molekülwolke entstanden. In einer protoplanetaren Scheibe um die junge Sonne kam es vor etwa 4,5 Milliarden Jahren...
Spitzer and Herschel observations of TNOS: potential and pitfalls (2008)
Thanks largely to the Spitzer Space Telescope, thermal-infrared observations of TNOs have begun to contribute significantly to our understanding of these fascinating objects. After its launch ESA’s...
ASTEX - A study of a lander and orbiter mission to two near-Earth asteroids (2008)
Boehnhardt, Hermann, Nathues, Andreas, Harris, Alan, ASTEX Study Team
ASTEX stands for a feasibility study of an exploration mission to two near-Earth asteroids. The targets should have different mineralogical constitution, more specifically one asteroid should be of...
Main belt binary asteroidal systems with eccentric mutual orbits (2008)
Marchis, Franck, Descamps, Pascal, Berthier, Jerome, Hestroffer, Daniel, Vachier, Frédéric, Baek, M, ...
Using 8–10-m class telescopes and their Adaptive Optics (AO) systems, we conducted a long-term adaptive optics campaign initiated in 2003 focusing on four binary asteroid systems: (130) Elektra,...
ASTEX - a study of a mission to visit two near-Earth asteroids (2008)
Nathues, Andreas, Boehnhardt, Hermann, Harris, Alan
Introduction: ASTEX is a recently started DLR-funded feasibility study of an in-situ exploration mission to two near-Earth asteroids (NEAs). The selected mission targets are intended to have...
Herschel open time key programme: TNOs are cool: a survey of the transneptunian region (2008)
Müller, Thomas G., Lellouch, Emmanuel, Böhnhardt, Hermann, Stansberry, John, Barucci, Antonella, Crovisier, Jacques, ...
Spitzer survey of the Karin Cluster asteroids (2007)
Harris, Alan, Mueller, Michael, Lisse, Casey, Cheng, Andy, Osip, David
The Karin cluster is one of the youngest known families of main-belt asteroids, dating back to a collisional event only 5.8 Myr ago. Using the Spitzer Space Telescope we have sampled the thermal...
Spitzer observations of mutual events in the binary system (617) Patroclus-Menoetius (2007)
Mueller, Michael, Marchis, Franck, Emery, Josh, Berthier, Jerome, Hestroffer, Daniel, Harris, Alan, ...
We report Spitzer observations of the binary Trojan system (617) Patroclus-Menoetius during two mutual events, when respectively one component shadowed and occulted the other. Observing the thermal...
Delbo', Marco, Dell'Oro, Aldo, Harris, Alan, Mottola, Stefano, Mueller, Michael
Thermal inertia determines the temperature distribution over the surface of an asteroid and therefore governs the magnitude the Yarkovsky effect. The latter causes gradual drifting of the orbits of...
Harris, Alan, Mueller, Michael, Delbo, Marco, Bus, Schelte
The potentially-hazardous asteroid (33342) 1998 WT24 approached the Earth within 0.0125 AU on 2001 Dec. 16 and was the target of a number of optical, infrared, and radar observing campaigns. Interest...
Thermal Inertia of near-Earth Asteroids and Strength of the Yarkovsky Effect (2006)
Delbo, Marco, Dell'Oro, Aldo, Harris, Alan, Mottola, Stefano, Mueller, Michael
Thermal inertia is the physical parameter that controls the temperature distribution over the surface of an asteroid. It affects the strength of the Yarkovsky effect, which causes orbital drift of...
Thermal Inertia of Near-Earth Asteroids and Magnitude of the Yarkovsky Effect (2006)
Delbo, Marco, Dell'Oro, Aldo, Harris, Alan, Mottola, Stefano, Mueller, Michael
Thermal inertia is the physical parameter that controls the temperature distribution over the surface of an asteroid. It affects the strength of the Yarkovsky effect, which causes orbital drift of...
Asteroid Compositional Information from Thermal-Infrared Observations (2006)
Thermal-infrared observations are the main source of information on asteroid sizes and albedos. In many cases reflection spectra alone provide ambiguous information on asteroid mineralogy; albedos...
The Don Quijote Mission: Target Selection and Mitigation-Relevant Science Return (2006)
Harris, Alan, Galvez, Andres, Benz, Willy, Fitzsimmons, Alan, Green, Simon, Michel, Patrick, ...
The Don Quijote concept includes a rendezvous spacecraft and an impactor vehicle. The main aim of the mission is to carry out an experiment to demonstrate the modification of a near-Earth...
Asteroid Thermal Modeling: Recent Developments and Applications (2006)
Harris, Alan, Mueller, Michael
A variety of thermal models are used for the derivation of asteroid physical parameters from thermal-infrared observations. Simple models based on spherical geometry are often adequate for obtaining...
Near-Earth asteroids – Their physical nature and the impact hazard (2006)
Collisions between planetesimals (the precursors of present-day asteroids and comets) and growing planets forged the Solar System as we know it today. After the epoch of planet formation around 4.5...
The Don Quijote Mission (2006)
The history, the concept, and the current status of the Don Quijote Mission are described, including the rationale behind target selection, and the expected mitigation-relevant science return.
The Surface Properties of Small Asteroids from Thermal-Infrared Observations (2006)
While the physical characterization of near-Earth objects (NEOs) is progressing at a much slower rate than that of discovery, a substantial body of thermal-infrared data has been gathered over the...
Don Quijote Mission Study: Target Selection and Possible Science Return (2005)
Harris, Alan, Benz, Willy, Fitzsimmons, Alan, Green, Simon, Michel, Patrick, Valsecchi, Giovanni
Asteroiden - Bausteine der Planeten, aber auch eine Gefahr für die Menschheit ? (2005)
Nach unseren derzeitigen Kenntnissen ist die Sonne aus dem Gas und Staub einer Molekülwolke entstanden. In einer protoplanetaren Scheibe um die junge Sonne kam es vor etwa 4,5 Milliarden Jahren...
Peculiar Betulia Revisited: A Near-Earth Asteroid with a Bare-Rock Surface? (2005)
Harris, Alan, Mueller, Michael, Delbo, Marco, Bus, Schelte
The small C-type asteroid (1580) Betulia is an unusual near-Earth object (NEO) with a lightcurve that changes dramatically with changing solar phase angle, presumably due to a highly irregular shape...
Near-Earth asteroids: Their physical nature and the impact hazard (2005)
Collisions between planetesimals, the precursors of present-day asteroids and comets, and growing planets forged the Solar System as we know it today. After the epoch of planet formation around 4.5...
Harris, Alan, Benz, Willy, Fitzsimmons, Alan, Galvez, Andres, Green, Simon, Michel, Patrick, ...
In July 2002 the general studies programme of the European Space Agency (ESA) provided funding for preliminary studies of six space missions that could make significant contributions to our knowledge...
O’Dea, Kieran P., McKean, Paul G., Harris, Alan, Brown, K. Neil
Processing of the Plasmodium merozoite surface protein 1 (MSP-1) has been described for parasites maintained under in vitro conditions. We have now demonstrated, using CBA/Ca mice infected with...
Extr. de : "Acta universitatis upsaliensis", 46.
Thesis (Ph. D.)--Univ. of Chicago, Committee on Developmental Biology, March 1983.
Implications of Piaget for a philosophy of perception. (1972)
Thesis, Columbia University.
Harris, Alan, Bluestone, Rodney, Busby, Eileen, Davies, Geoffrey, Leatham, Aubrey, Siddons, Harold, ...
Pacing after myocardial infarction
Experience of endocardial pacing in eighty-two patients with atrioventricular block after myocardial infarction is described. A unipolar pacing wire was passed into an antecubital fossa vein and...