Results 21 to 30 of about 75,532 (195)

The transport of large near-Earth objects into the Centaur region

open access: yesAstronomy & Astrophysics
Context. Near-Earth objects (NEOs) and Centaurs are minor bodies that orbit the Sun in the terrestrial and giant-planet regions, respectively. Recent studies show that approximately 9% of the known large NEOs that leave the terrestrial planet region are ...
Araujo R. A. N.   +2 more
doaj   +1 more source

Thermal Model Calibration for Minor Planets Observed with WISE/NEOWISE: Comparison with IRAS

open access: yes, 2011
With thermal infrared observations detected by the NEOWISE project, we have measured diameters for 1742 minor planets that were also observed by the Infrared Astronomical Satellite (IRAS).
Bowell   +12 more
core   +1 more source

Weak S-type asteroids compared to C-type explain the observed size distribution of the main belt

open access: yesAstronomy & Astrophysics
The main belt, the region between the orbits of Mars and Jupiter, is home to more than 1 million asteroids. These asteroids form orbital groups, (i.e., asteroid families formed by collisions) and also spectral groups (taxonomies) with different chemical ...
Vávra M., Brož M.
doaj   +1 more source

Classification of asteroid families with artificial neural networks [PDF]

open access: yesSerbian Astronomical Journal, 2020
This paper describes an artificial neural network for classification of asteroids into families. The data used for artificial neural network training and testing were obtained by the Hierarchical Clustering Method (HCM).
Vujičić D.   +5 more
doaj   +1 more source

The HARPS search for southern extrasolar planets XXI. Three new giant planets orbiting the metal-poor stars HD5388, HD181720, and HD190984

open access: yes, 2010
We present the discovery of three new giant planets around three metal-deficient stars: HD5388b (1.96M_Jup), HD181720b (0.37M_Jup), and HD190984b (3.1M_Jup).
C. Lovis   +48 more
core   +3 more sources

People Love to Name Things: Current Trends in Naming Minor Planets

open access: yesВопросы ономастики
After several introductory remarks regarding the onomastic terminology used for names of celestial objects, the article proposes a semantic and a limited formal analysis of the minor planet names officially published in 2022 by the International ...
Jan Holeš
doaj   +1 more source

CCD astrometric observations of minor planets at the Belgrade observatory during 1999 (II) [PDF]

open access: yesSerbian Astronomical Journal, 2001
76 precise astrometric positions of six observed minor planets (two NEO among them) are calculated. The SBIG ST-8 camera attached to Askania astrograph of Belgrade Observatory was used in the observations.
Protitch-Benishek V., Benishek Vl.
doaj   +1 more source

Near Infrared Surface Properties of the Two Intrinsically Brightest Minor Planets (90377) Sedna and (90482) Orcus [PDF]

open access: yes, 2005
We present low resolution K band spectra taken at the Gemini 8 meter telescope of (90377) Sedna and (90482) Orcus (provisional designations 2003 VB12 and 2004 DW, respectively), currently the two minor planets with the greatest absolute magnitudes (i.e ...
Brown, Michael E.   +3 more
core   +3 more sources

An Objective Classification Scheme for Solar-System Bodies Based on Surface Gravity

open access: yesGalaxies
We introduce succinct and objective definitions of the various classes of objects in the solar system. Unlike the formal definitions adopted by the International Astronomical Union in 2006, group separation is obtained from measured physical properties ...
Dimitris M. Christodoulou   +2 more
doaj   +1 more source

Destruction of Binary Minor Planets During Neptune Scattering

open access: yes, 2010
The existence of extremely wide binaries in the low-inclination component of the Kuiper Belt provides a unique handle on the dynamical history of this population. Some popular frameworks of the formation of the Kuiper Belt suggest that planetesimals were
Collins   +6 more
core   +1 more source

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