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The asteroid 2014 JO25, considered to be "potentially hazardous" by the Minor Planet Center, was spectroscopically followed during its close-Earth encounter on 19th and 20th of April 2017. The spectra of the asteroid were taken with the low…

Earth and Planetary Astrophysics · Physics 2019-05-01 Kumar Venkataramani , Shashikiran Ganesh , Archita Rai , Marek Husárik , K. S. Baliyan , U. C. Joshi

We evaluated the planetary radar capabilities at Arecibo, the Goldstone 70-m DSS-14 and 34-m DSS-13 antennas, the 70-m DSS-43 antenna at Canberra, the Green Bank Telescope, and the Parkes Radio Telescope in terms of their relative…

Earth and Planetary Astrophysics · Physics 2016-10-12 Shantanu. P. Naidu , Lance. A. M. Benner , Jean-Luc Margot , Michael. W. Busch , Patrick. A. Taylor

We present the first-ever measurements of the surface colors and rotational properties of a recently discovered distant object in an unusual orbit 2016 ND21. In 2017, this object was close to its perihelion, which allowed us to observe it…

Earth and Planetary Astrophysics · Physics 2019-12-18 Tetiana Hromakina , Sergey Velichko , Irina Belskaya , Yurij Krugly , Aleksandr Sergeev

The nature and origin of the asteroids orbiting in near-Earth space, including those on a potentially hazardous trajectory, is of both scientific interest and practical importance. We aim here at determining the taxonomy of a large sample…

Earth and Planetary Astrophysics · Physics 2016-02-24 Benoit Carry , Enrique Solano , Siegfried Eggl , Francesca E. DeMeo

Near-Earth objects (NEOs) are excellent laboratories for testing processes that affect airless bodies, as well as informing us about Solar System history. Though most NEOs are nominally anhydrous because they formed inside the Solar System…

Earth and Planetary Astrophysics · Physics 2026-02-03 Lauren McGraw , Cristina Thomas , Josh Emery , Andy Rivkin

Studying small near-Earth asteroids is important to understand their dynamical histories and origins as well as to mitigate the damage of the asteroid impact to the Earth. We report the results of multicolor photometry of the tiny…

We report results of Canberra-ATCA Doppler-only continuous wave (CW) radar observations of near-Earth asteroid (163899) 2003 SD220 at a receiving frequency of 7159 MHz (4.19 cm) on 2018 December 20, 21, and 22 during its close approach…

We report on the results of a six-month photometric study of the main-belt binary C-type asteroid 121 Hermione, performed during its 2007 opposition. We took advantage of the rare observational opportunity afforded by one of the annual…

We have carried out simulations to predict the performance of a new space-based telescopic survey operating at thermal infrared wavelengths that seeks to discover and characterize a large fraction of the potentially hazardous near-Earth…

Earth and Planetary Astrophysics · Physics 2015-06-23 A. Mainzer , T. Grav , J. Bauer , T. Conrow , R. M. Cutri , J. Dailey , J. Fowler , J. Giorgini , T. Jarrett , J. Masiero , T. Spahr , T. Statler , E. L. Wright

We perform high fidelity simulations of a wide-field telescopic survey searching for Near-Earth Objects (NEO) larger than 140\,m, focusing on the observational and detection model, detection efficiency and accuracy. As a test survey we…

Earth and Planetary Astrophysics · Physics 2017-06-30 Peter Vereš , Steven R. Chesley

The Near Earth Object Surveyor mission has a requirement to find two-thirds of the potentially hazardous asteroids larger than 140 meters in size. In order to determine the mission's expected progress toward this goal during design and…

Earth and Planetary Astrophysics · Physics 2023-10-20 Joseph R. Masiero , Dar W. Dahlen , Amy K. Mainzer , William F. Bottke , Jennifer C. Bragg , James. M. Bauer , Tommy Grav

Part of the European Near Earth Asteroids Research (EURONEAR) project, in 2014 we started a survey to observe light curves of Near Earth Asteroids (NEAs) using the available telescopes of this network. This is the first paper presenting…

Earth and Planetary Astrophysics · Physics 2018-01-30 A. Aznar Macias , M. Predatu , O. Vaduvescu , J. Oey

Studies on Near Earth Asteroids (NEAs) throw light on discoveries, identification, orbit prediction and civil alert capabilities, including potential asteroid impact hazards. Due to various new observational programs, the discovery rate of…

Earth and Planetary Astrophysics · Physics 2016-07-21 J. Rukmini , G. Raghavendra , S. A. Ahmed , D. Shanti Priya , Syeda Azeem Unnisa

Context. The study of planet-crossing asteroids is of both practical and fundamental importance. As they are closer than asteroids in the Main Belt, we have access to a smaller size range, and this population frequently impacts planetary…

Earth and Planetary Astrophysics · Physics 2023-12-06 A. V. Sergeyev , B. Carry , M. Marsset , P. Pravec , D. Perna , F. E. DeMeo , V. Petropoulou , M. Lazzarin , F. La Forgia , I. Di Petro , the NEOROCKS team

We present low resolution reflectance spectra over the wavelength range 5000-10000\AA for 4 asteroids (3 belonging to the Nysa family and one near-Earth asteroid) obtained at the San Pedro Martir Observatory (Mexico) using the 2.1 m…

Astrophysics · Physics 2007-05-23 A. Manara , S. Covino , M. Di Martino

We present lightcurve observations and their multiband photometry for near-Earth object (NEO) 2011 XA3. The lightcurve has shown a periodicity of 0.0304 +- 0.0003 day (= 43.8 +- 0.4 min). The fast rotation shows that 2011 XA3 is in a state…

Earth and Planetary Astrophysics · Physics 2015-06-19 S. Urakawa , K. Ohtsuka , S. Abe , T. Ito , T. Nakamura

We report 491 new near-infrared spectroscopic measurements of 420 near-Earth objects (NEOs) collected on the NASA InfraRed Telescope Facility (IRTF) as part of the MIT-Hawaii NEO Spectroscopic Survey (MITHNEOS). These measurements were…

We present our astrometric observations of the small near-Earth object 2011~MD ($H \sim 28.0$), obtained after its very close fly-by to Earth in June 2011. Our set of observations extends the observational arc to $73$ days, and together…

Earth and Planetary Astrophysics · Physics 2014-10-06 Marco Micheli , David J. Tholen , Garrett T. Elliott

Over 4.5 years, the Mission Accessible Near-Earth Object Survey (MANOS) assembled 228 Near-Earth Object (NEO) lightcurves. We report rotational lightcurves for 82 NEOs, constraints on amplitudes and periods for 21 NEOs, lightcurves with no…