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- Center for Astrophysics Harvard & SmithsonianUS325 papers
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28 papers · 2 filters
A 2 km-size asteroid challenging the rubble-pile spin barrier - a case for cohesion
D. Polishook, N. Moskovitz, R. P. Binzel +11
The rubble pile spin barrier is an upper limit on the rotation rate of asteroids larger than ~200-300 m. Among thousands of asteroids with diameters larger than ~300 m, only a hand…
Transiting the Sun II: The impact of stellar activity on Lyman- transits
J Llama, E. L. Shkolnik
High-energy observations of the Sun provide an opportunity to test the limits of our ability to accurately measure properties of transiting exoplanets in the presence of stellar ac…
Absolute magnitudes and phase coefficients of trans-Neptunian objects
A. Alvarez-Candal, N. Pinilla-Alonso, J. L. Ortiz +5
Context: Accurate measurements of diameters of trans-Neptunian objects are extremely complicated to obtain. Thermal modeling can provide good results, but accurate absolute magnitu…
Results from the Worldwide Coma Morphology Campaign for Comet ISON (C/2012 S1)
Nalin H. Samarasinha, 48 co-authors
We present the results of a global coma morphology campaign for comet C/2012 S1 (ISON), which was organized to involve both professional and amateur observers. In response to the c…
Searching for color variation on fast rotating asteroids with simultaneous V-J observations
David Polishook, Nicholas Moskovitz
Boulders, rocks and regolith on fast rotating asteroids (<2.5 hours) are modeled to slide towards the equator due to a strong centrifugal force and a low cohesion force. As a resul…
Observing Outer Planet Satellites (except Titan) with JWST: Science Justification and Observational Requirements
Laszlo Keszthelyi, Will Grundy, John Stansberry +6
The James Webb Space Telescope (JWST) will allow observations with a unique combination of spectral, spatial, and temporal resolution for the study of outer planet satellites withi…