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The catalog of km-sized near-Earth objects (NEOs) is nearly complete. Typical impact monitoring analyses search for possible impacts over the next 100 years and none of the km-sized objects represent an impact threat over that time…

Earth and Planetary Astrophysics · Physics 2023-06-28 Oscar Fuentes-Muñoz , Daniel J. Scheeres , Davide Farnocchia , Ryan S. Park

We present the preliminary results of an analysis of the sub-populations within the near-Earth asteroids, including the Atens, Apollos, Amors, and those that are considered potentially hazardous using data from the Wide-field Infrared…

Earth and Planetary Astrophysics · Physics 2015-06-05 A. Mainzer , T. Grav , J. Masiero , J. Bauer , R. S. McMillan , J. Giorgini , T. Spahr , R. M. Cutri , D. J. Tholen , R. Jedicke , R. Walker , E. Wright , C. R. Nugent

We present a new system of narrow band filters in the near infrared that can be used to classify stars and brown dwarfs. This set of four filters, spanning the H band, can be used to identify molecular features unique to brown dwarfs, such…

Astrophysics · Physics 2009-11-10 A. K. Mainzer , Ian S. McLean , J. L. Sievers , E. T. Young

Missions to near-Earth objects (NEOs) are key destinations in NASA's new "Flexible Path" approach. NEOs are also of interest for science, for the hazards they pose, and for their resources. We emphasize the importance of ultra-low delta-v…

Earth and Planetary Astrophysics · Physics 2011-06-16 Martin Elvis , Jonathan McDowell , Jeffrey A. Hoffman , Richard P. Binzel

Near-Earth asteroids (NEAs) in the 1-100 meter size range are estimated to be $\sim$1,000 times more numerous than the $\sim$15,000 currently-catalogued NEAs, most of which are in the 0.5-10 kilometer size range. Impacts from 10-100 meter…

Near Earth Asteroids (NEAs) are discovered daily, mainly by few major surveys, nevertheless many of them remain unobserved for years, even decades. Even so, there is room for new discoveries, including those submitted by smaller projects…

Instrumentation and Methods for Astrophysics · Physics 2019-01-31 D. Copandean , O. Vaduvescu , D. Gorgan

Possible connections between the physical properties of Near-Earth Asteroids (NEA) and their orbital evolution were explored, with emphasis on binary asteroids. Our main starting hypothesis, suggested from the observations, was that the NEA…

Astrophysics · Physics 2007-05-23 Mihailo Cubrovic

A next generation of space-based observatories aims to detect and characterize potentially Earth-like exoplanets around Sun-like stars using reflected light spectroscopy. However, it remains unclear how such direct imaging…

Earth and Planetary Astrophysics · Physics 2025-10-28 Arnaud Salvador , Tyler D. Robinson

Large or even medium sized asteroids impacting the Earth can cause damage on a global scale. Existing and planned concepts for finding near-Earth objects (NEOs) with diameter of 140 m or larger would take ~15-20 years of observation to find…

Earth and Planetary Astrophysics · Physics 2018-11-14 Michael Shao , Hanying Zhou , Slava G. Turyshev , Chengxing Zhai , Navtej Saini , Russell Trahan

We present a detailed observational strategy for finding Near Earth Objects (NEOs) with the Sloan Digital Sky Survey (SDSS) telescope. We investigate strategies in normal, unbinned mode as well as binning the CCDs 2x2 or 3x3, which affects…

We present visible spectroscopic observations of a near-earth object (NEO) 2012 DA14. The asteroid 2012 DA14 came close to the surface of the Earth on February 15, 2013 at a distance of 27,700 km. Its estimated diameter is around 45 m. The…

Earth and Planetary Astrophysics · Physics 2015-06-16 Seitaro Urakawa , Mitsugu Fujii , Hidekazu Hanayama , Jun Takahashi , Tsuyoshi Terai , Osamu Oshima

We extend the most recent orbital and absolute magnitude Near Earth Object (NEO) model (Granvik et al., 2018) to provide a statistical description of NEO geometric albedos. Our model is calibrated on NEOWISE albedo data for the NEO…

The precise astrometric observation of small near-Earth objects (NEOs) is an important observational research topic in the astrometric discipline, which greatly promotes multidisciplinary research, such as the origin and evolution of the…

Instrumentation and Methods for Astrophysics · Physics 2021-12-01 Yigong Zhang , Jiancheng Wang , Jie Su , Xiangming Cheng , Zhenjun Zhang

The near-earth object camera (NEOCam) is a proposed infrared space mission designed to discover and characterize most of the potentially hazardous asteroids larger than 140 m in diameter that orbit near the Earth. NASA has funded technology…

We present an approach that significantly increases the sensitivity for finding and tracking small and fast near Earth asteroids (NEA's). This approach relies on a combined use of a new generation of high-speed cameras which allow short,…

Instrumentation and Methods for Astrophysics · Physics 2014-08-20 Michael Shao , Bijan Nemati , Chengxing Zhai , Slava G. Turyshev , Jagmit Sandhu , Gregg W. Hallinan , Leon K. Harding

This article describes a citizen-science project conducted by the Spanish Virtual Observatory (SVO) to improve the orbits of near-Earth asteroids (NEAs) using data from astronomical archives. The list of NEAs maintained at the Minor Planet…

Instrumentation and Methods for Astrophysics · Physics 2015-06-15 E. Solano , C. Rodrigo , R. Pulido , B. Carry

We are a group of over two dozen astronomers, computer scientists, data scientists and digital Big Data research platform experts at 11 universities and research institutes in South Africa and Europe. We study Near-Earth Objects (NEOs) for…

Gaia is an astrometric mission that will be launched in 2013 and set on L2 point of Lagrange. It will observe a large number of Solar System Objets (SSO) down to magnitude 20. The Solar System Science goal is to map thousand of Main Belt…

Earth and Planetary Astrophysics · Physics 2016-08-30 D. Bancelin , D. Hestroffer , W. Thuillot

Context: The local census of very low-mass stars and brown dwarfs is crucial to improving our understanding of the stellar-substellar transition and their formation history. These objects, known as ultra-cool dwarfs (UCDs), are essential…

Increasing our knowledge of the orbits and compositions of Near-Earth Objects (NEOs) is important for a better understanding of the evolution of the Solar System and of life. The detection of serendipitous NEO appearances among the millions…