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NEOMOD 2: An updated model of Near-Earth Objects from a decade of Catalina Sky Survey observations by David Nesvorný; David Vokrouhlický; Frank Shelly; Rogerio Deienno; William F. Bottke; Eric Christensen; Robert Jedicke; Shantanu Naidu; Steven R. Chesley; Paul W. Chodas; Davide Farnocchia; Mikael Granvik is a Physics and Astronomy article available to read on EtoBox.
What is NEOMOD 2: An updated model of Near-Earth Objects from a decade of Catalina Sky Survey observations about?
Catalina Sky Survey (CSS) is a major survey of Near-Earth Objects (NEOs). In a recent work, we used CSS observations from 2005-2012 to develop a new population model of NEOs (NEOMOD). CSS's G96 telescope was upgraded in 2016 and detected over 10,000 unique NEOs since then. Here we characterize the NEO detection efficiency of G96 and use G96's NEO detections from 2013-2022 to update NEOMOD. This resolves previous model inconsistencies related to the population of large NEOs. We estimate there are 936 ± 29 NEOs with absolute magnitude H 1 km for the reference albedo p V = 0.14) and semimajor axis a < 4.2 au. The slope of the NEO size distribution for H = 25-28 is found to be relatively shallow (cumulative index ≃ 2.6) and the number of H 9 m for p V = 0.14) is determined to be (1.20 ± 0.04) × 10 7 , about 3 times lower than in Harris & Chodas (2021). Small NEOs have a different orbital distribution and higher impact probabilities than large NEOs. We estimate 0.034 ± 0.002 impacts of H < 28 NEOs on the Earth per year, which is near the low end of the impact flux range inferred from atmospheric bolide observations. Relative to a model where all NEOs are delivered directly from the
Who reads NEOMOD 2: An updated model of Near-Earth Objects from a decade of Catalina Sky Survey observations?
It is typically read by researchers, students, and practitioners in Physics and Astronomy.
- Author
- David Nesvorný; David Vokrouhlický; Frank Shelly; Rogerio Deienno; William F. Bottke; Eric Christensen; Robert Jedicke; Shantanu Naidu; Steven R. Chesley; Paul W. Chodas; Davide Farnocchia; Mikael Granvik
- Publisher
- Elsevier BV
- Published
- 2024
- Language
- EN
- Field
- Physics and Astronomy (Physical Sciences)