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Nature of the small main belt Asteroid 3169 Ostro

Published in Icarus

We present a set of rotational lightcurve measurements of the small main belt Asteroid 3169 Ostro. Our observations reveal an unambiguous, double-peaked rotational lightcurve with a peak-to-peak variation up to 1.2±0.05 mag and a synodic period of 6.509±0.001 h. From the large flux variation and the overall shape of the lightcurves, we suggest that...

The atmospheric influence, size and possible asteroidal nature of the July 2009 Jupiter impactor

Published in Icarus

Near-infrared and mid-infrared observations of the site of the 2009 July 19 impact of an unknown object with Jupiter were obtained within days of the event. The observations were used to assess the properties of a particulate debris field, elevated temperatures, and the extent of ammonia gas redistributed from the troposphere into Jupiter s stratos...

Constraints on the source of lunar cataclysm impactors

Published in Icarus

Physical constraints on impact melt properties from Lunar Reconnaissance Orbiter Camera images

Published in Icarus

Evidence for Middle Amazonian catastrophic flooding and glaciation on Mars

Published in Icarus

Tvashtar awakening detected in April 2006 with OSIRIS at the WM Keck Observatory

Published in Icarus

We detected a volcanic outburst in Io s northern hemisphere on 17 April 2006 with the OSIRIS imaging spectrometer at Keck, and confirmed it was still erupting on 2 June 2006. The eruption, which we name 060417A, was located in Tvashtar Paterae,∼ 100 km southeast of the February 2000 eruption. The observed temperature was 1240±4K, over a surface are...

Vertical Distribution of Scattering Hazes in

Published in Icarus

Aegaeon (Saturn LIII), a G-ring object

Published in Icarus

Aegaeon (Saturn LIII, S/2008 S1) is a small satellite of Saturn that orbits within a bright arc of material near the inner edge of Saturn s G-ring. This object was observed in 21 images with Cassini s Narrow-Angle Camera between June 15 (DOY 166), 2007 and February 20 (DOY 051), 2009. If Aegaeon has similar surface scattering properties as other ne...

Adaptive optics mapping of Io s volcanism in the thermal IR (3.8 μm)

Published in Icarus

Two opposite hemispheres of Io were observed on October 20 and 21, 1996, through an L′ broadband filter, using the high-resolution capability of the Adaptive Optics (AO) system implemented on the ESO 3.6-m telescope at La Silla, Chile. These observations, performed at thermal wavelengths when Io is in daylight, have been carefully processed to impr...

Global documentation of gullies with the Mars Reconnaissance Orbiter Context Camera and implications for their formation...

Published in Icarus

Hypotheses ranging from fluvial processes and debris flows to CO 2 frost-lubricated or entirely dry flows have been proposed for the formation of martian gullies. In order to constrain these potential formation mechanisms, we mapped the global distribution of gullies on Mars using> 54,000 images from the Mars Reconnaissance Orbiter (MRO) Context Ca...