Results 11 to 20 of about 2,342,248 (206)

A photometric search for active Main Belt asteroids [PDF]

open access: yesAstronomy & Astrophysics, 2014
It is well known that some Main Belt asteroids show comet-like features. A representative example is the first known Main Belt comet 133P/(7968) Elst-Pizarro. If the mechanisms causing this activity are too weak to develop visually evident comae or tails,
S. Cikota   +4 more
semanticscholar   +6 more sources

SEARCH FOR THE RETURN OF ACTIVITY IN ACTIVE ASTEROID 176P/LINEAR [PDF]

open access: bronzeThe Astronomical Journal, 2014
We present the results of a search for the reactivation of active asteroid 176P/LINEAR during its 2011 perihelion passage using deep optical observations obtained before, during, and after that perihelion passage. Deep composite images of 176P constructed from data obtained between June 2011 and December 2011 show no visible signs of activity, while ...
Henry H. Hsieh   +20 more
openalex   +8 more sources

Systematic Characterization of and Search for Activity in Potentially Active Asteroids

open access: yesThe Planetary Science Journal, 2020
We report on our long-term observational campaign to characterize and monitor a select sample of 75 dynamically selected dormant comet candidates and six near-Sun asteroids.
Michael Mommert   +7 more
semanticscholar   +3 more sources

A NEAR-INFRARED SEARCH FOR SILICATES IN JOVIAN TROJAN ASTEROIDS [PDF]

open access: bronzeThe Astronomical Journal, 2011
We obtained near-infrared (0.8 - 2.5 micron) spectra of seven Jovian Trojan asteroids that have been formerly reported to show silicate-like absorption features near 1 micron. Our sample includes the Trojan (1172) Aneas, which is one of three Trojans known to possess a comet-like 10 micron emission feature, indicative of fine-grained silicates.
Bin Yang, David Jewitt
openalex   +5 more sources

In Search of the Potentially Hazardous Asteroids in the Taurid Resonant Swarm

open access: goldThe Planetary Science Journal
Abstract The Taurid Complex is a large interplanetary system that contains comet 2P/Encke, several meteoroid streams, and possibly a number of near-Earth asteroids. The size and nature of the system have led to the speculation that it was formed through a large-scale cometary breakup.
Jasmine Li   +10 more
openalex   +4 more sources

A SEARCH FOR FAST OPTICAL TRANSIENTS IN THE Pan-STARRS1 MEDIUM-DEEP SURVEY: M-DWARF FLARES, ASTEROIDS, LIMITS ON EXTRAGALACTIC RATES, AND IMPLICATIONS FOR LSST [PDF]

open access: bronze, 2013
We present a search for fast optical transients (τ ∼ 0.5 hr–1 day) using repeated observations of the Pan-STARRS1 Medium-Deep Survey (PS1/MDS) fields.
E. Berger   +14 more
openalex   +2 more sources

Search for the H Chondrite Parent Body among the Three Largest S-type Asteroids: (3) Juno, (7) Iris, and (25) Phocaea

open access: bronzeAstronomical Journal, 2019
Linking meteorites to source regions in the main asteroid belt is important for understanding the conditions under which their parent bodies formed. Ordinary chondrites are the most abundant class of meteorites on Earth, totaling 86% of all collected ...
John W. Noonan   +24 more
openalex   +2 more sources

Search strategies for Trojan asteroids in the inner Solar System [PDF]

open access: greenPlanetary and Space Science, 2011
Trojan asteroids are minor planets that share the orbit of a planet about the Sun and librate around the L4 or L5 Lagrangian points of stability. They are important because they carry information on early Solar System formation, when collisions between bodies were more frequent.
M. Todd, D. M. Coward, Marjan Zadnik
openalex   +4 more sources

Infrared reflectance spectra of asteroids - A search for water of hydration

open access: bronzeThe Astronomical Journal, 1980
Infrared reflectance spectra have shown the presence of an absorption feature in the 3-4 micron region for seven C and U asteroids. By comparison with laboratory spectra of terrestrial silicates and meteorites, it is concluded that this band is probably due to water in the form of hydrated salts and silicates (clay minerals), implying that the surface ...
L. A. Lebofsky
openalex   +3 more sources

Analysis of the rotation period of asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger – search for the YORP effect [PDF]

open access: bronze, 2012
Context. The spin state of small asteroids can change on a long timescale by the Yarkovsky-O’Keefe-Radzievskii-Paddack (YORP) effect, the net torque that arises from anisotropically scattered sunlight and proper thermal radiation from an irregularly ...
Josef Ďurech   +30 more
openalex   +3 more sources

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