A5040875423- Astro and Planetary Science
- Isotope Analysis in Ecology
- Stellar, planetary, and galactic studies
- Planetary Science and Exploration
- Gamma-ray bursts and supernovae
- Nuclear Physics and Applications
- Geology and Paleoclimatology Research
- Space Exploration and Technology
- Geophysical Methods and Applications
- Astronomical and nuclear sciences
- Business, Innovation, and Economy
- Reformation and Early Modern Christianity
- Atmospheric Ozone and Climate
- Laser-induced spectroscopy and plasma
- Solar and Space Plasma Dynamics
- Financial Crisis of the 21st Century
- SAS software applications and methods
- Space Satellite Systems and Control
- Geomagnetism and Paleomagnetism Studies
Abstract We describe results of a planetary defense exercise conducted during the close approach to Earth by near-Earth asteroid (99942) Apophis 2020 December–2021 March. The community has been conducting observational campaigns since 2017 test operational readiness global capabilities. These community-led exercises were carried out with support NASA’s Planetary Defense Coordination Office and International Asteroid Warning Network. campaign is third in our series exercises. goal this was...
Within our international program to obtain accurate physical properties of trans-Neptunian objects (TNOs) we predicted a stellar occultation by the TNO (38628) Huya star Gaia DR2 4352760586390566400 (mG = 11.5 mag.) for March 18, 2019. After an extensive observational campaign, updated prediction and it turned out be favorable central Europe. Therefore, mobilized half hundred professional amateur astronomers, was finally detected from 21 telescopes located at 18 sites. This makes event one...
Abstract As part of the International Asteroid Warning Network's observational exercises, we conducted a campaign to observe near-Earth asteroid 2019 XS around its close approach Earth on 2021 November 9. The goal was characterize errors in observation times reported Minor Planet Center, which become an increasingly important consideration as astrometric accuracy improves and more fast-moving asteroids are observed. exercise, total 957 observations during encounter were subsequently analyzed...
Abstract The Earth close approach of near-Earth asteroid 2005 LW3 on 2022 November 23 represented a good opportunity for second observing campaign to test the timing accuracy astrometric observation. With 82 participating stations, International Asteroid Warning Network collected 1046 observations around time approach. Compared previous targeting 2019 XS, some individual observers were able significantly improve their reported observation times. In particular, U.S. surveys achieved...
Abstract We report observations of the Apollo-class potentially hazardous asteroid 1981 Midas, which passed 0.090 au from Earth (35 lunar distances) on 2018 March 21. During this close approach, Midas was observed by radar both Arecibo Observatory 21 through 25 (five nights) and NASA’s Goldstone Deep Space Communications Complex 19 Optical lightcurves were obtained other observers during four apparitions (1987, 1992, 2004, 2018), showed a rotation period 5.22 hr. By combining data, we have...