A5083803136- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Isotope Analysis in Ecology
- Astronomical Observations and Instrumentation
- History and Developments in Astronomy
- Solar and Space Plasma Dynamics
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Geomagnetism and Paleomagnetism Studies
- Archaeology and ancient environmental studies
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Ancient Near East History
- Astronomy and Astrophysical Research
- Food Industry and Aquatic Biology
- Engineering Education and Pedagogy
- Science Education and Pedagogy
- Oceanographic and Atmospheric Processes
- Marine and environmental studies
- Historical, Religious, and Philosophical Studies
- Historical Astronomy and Related Studies
- Calibration and Measurement Techniques
- Geological and Geochemical Analysis
Columbia Basin College
2011
Disk-integrated photometric data of asteroids do not contain accurate information on shape details or size scale. Additional such as disk-resolved images stellar occultation measurements further constrain asteroid shapes and allow estimates. We aim to use all available about forty obtained by the Near-InfraRed Camera (Nirc2) mounted W.M. Keck II telescope together with disk-integrated photometry determine their volumes. can then volume, in combination known mass, derive bulk density....
We present results of a stellar occultation by the Jupiter Trojan asteroid Patroclus and its nearly equal size moon, Menoetius. The geocentric mid-time event was 2013 October 21 06:43:02 UT. Eleven sites out 36 successfully recorded an occultation. Seven chords across yielded elliptical limb fit 124.6 98.2 km. There were six Menoetius that 117.2 93.0 three got on both objects. At time we measured separation 664.6 km (0.247 arcsec) position angle for 2657 eastward from J2000 north. Combining...
Occultations of stars by asteroids have been observed since 1961, increasing from a very small number to now over 500 annually. We created and regularly maintain growing data-set more than 5,000 asteroidal occultations. The includes: the raw observations; astrometry at 1 mas level based on centre mass or figure (not illumination); where possible asteroid's diameter 5 km better, fits shape models; separation diameters satellites; double star discoveries with typical separations being in tens...
The capability to caracterize small bodies by stellar occultations has expanded enormously thanks the Gaia mission, whose accurate astrometry improved order of magnitude accuracy star positions and proper motions, asteroid orbits. More more minor planets as 5-10~km in Main Belt are reported observers often equipped with mobile telescopes modest size. Appropriate techniques recover absolute timing observed events software tools that now widely available permit (relative positions) accuracies...
Abstract For 40 years, the sizes and shapes of many dozens asteroids have been determined from observations asteroidal occultations, over a thousand high-precision positions relative to stars measured. Some first evidence for satellites was obtained early efforts; now, orbits some discovered by other means refined occultation observations. Also, several close binary discovered, angular diameters measured analysis these The International Occultation Timing Association (IOTA) coordinates this...