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Title: PHYSICAL CHARACTERIZATION AND ORIGIN OF BINARY NEAR-EARTH ASTEROID (175706) 1996 FG{sub 3}

Abstract

The near-Earth asteroid (NEA) (175706) 1996 FG{sub 3} is a particularly interesting spacecraft target: a binary asteroid with a low-{Delta}v heliocentric orbit. The orbit of its satellite has provided valuable information about its mass density while its albedo and colors suggest it is primitive or part of the C-complex taxonomic grouping. We extend the physical characterization of this object with new observations of its emission at mid-infrared wavelengths and with near-infrared reflection spectroscopy. We derive an area-equivalent system diameter of 1.90 {+-} 0.28 km (corresponding to approximate component diameters of 1.83 km and 0.51 km, respectively) and a geometric albedo of 0.039 {+-} 0.012. (175706) 1996 FG{sub 3} was previously classified as a C-type asteroid, though the combined 0.4-2.5 {mu}m spectrum with thermal correction indicates classification as B-type; both are consistent with the low measured albedo. Dynamical studies show that (175706) 1996 FG{sub 3} most probably originated in the inner main asteroid belt. Recent work has suggested the inner Main Belt (142) Polana family as the possible origin of another low-{Delta}v B-type NEA, (101955) 1999 RQ{sub 36}. A similar origin for (175706) 1996 FG{sub 3} would require delivery by the overlapping Jupiter 7:2 and Mars 5:9 mean motion resonances rathermore » than the {nu}{sub 6}, and we find this to be a low probability, but possible, origin.« less

Authors:
 [1]; ;  [2];
  1. Southwest Research Institute, 1050 Walnut Street Suite 400, Boulder, CO 80302 (United States)
  2. UNS-CNRS-Observatoire de la Cote d'Azur, BP 4229, 06304 Nice Cedex 04 (France)
Publication Date:
OSTI Identifier:
22016105
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 748; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALBEDO; APPROXIMATIONS; ASTEROIDS; ASTROPHYSICS; JUPITER PLANET; MARS PLANET; ORBITS; PROBABILITY; SPECTROSCOPY

Citation Formats

Walsh, Kevin J, Delbo, Marco, Mueller, Michael, Binzel, Richard P, and DeMeo, Francesca E., E-mail: kwalsh@boulder.swri.edu. PHYSICAL CHARACTERIZATION AND ORIGIN OF BINARY NEAR-EARTH ASTEROID (175706) 1996 FG{sub 3}. United States: N. p., 2012. Web. doi:10.1088/0004-637X/748/2/104.
Walsh, Kevin J, Delbo, Marco, Mueller, Michael, Binzel, Richard P, & DeMeo, Francesca E., E-mail: kwalsh@boulder.swri.edu. PHYSICAL CHARACTERIZATION AND ORIGIN OF BINARY NEAR-EARTH ASTEROID (175706) 1996 FG{sub 3}. United States. https://doi.org/10.1088/0004-637X/748/2/104
Walsh, Kevin J, Delbo, Marco, Mueller, Michael, Binzel, Richard P, and DeMeo, Francesca E., E-mail: kwalsh@boulder.swri.edu. 2012. "PHYSICAL CHARACTERIZATION AND ORIGIN OF BINARY NEAR-EARTH ASTEROID (175706) 1996 FG{sub 3}". United States. https://doi.org/10.1088/0004-637X/748/2/104.
@article{osti_22016105,
title = {PHYSICAL CHARACTERIZATION AND ORIGIN OF BINARY NEAR-EARTH ASTEROID (175706) 1996 FG{sub 3}},
author = {Walsh, Kevin J and Delbo, Marco and Mueller, Michael and Binzel, Richard P and DeMeo, Francesca E., E-mail: kwalsh@boulder.swri.edu},
abstractNote = {The near-Earth asteroid (NEA) (175706) 1996 FG{sub 3} is a particularly interesting spacecraft target: a binary asteroid with a low-{Delta}v heliocentric orbit. The orbit of its satellite has provided valuable information about its mass density while its albedo and colors suggest it is primitive or part of the C-complex taxonomic grouping. We extend the physical characterization of this object with new observations of its emission at mid-infrared wavelengths and with near-infrared reflection spectroscopy. We derive an area-equivalent system diameter of 1.90 {+-} 0.28 km (corresponding to approximate component diameters of 1.83 km and 0.51 km, respectively) and a geometric albedo of 0.039 {+-} 0.012. (175706) 1996 FG{sub 3} was previously classified as a C-type asteroid, though the combined 0.4-2.5 {mu}m spectrum with thermal correction indicates classification as B-type; both are consistent with the low measured albedo. Dynamical studies show that (175706) 1996 FG{sub 3} most probably originated in the inner main asteroid belt. Recent work has suggested the inner Main Belt (142) Polana family as the possible origin of another low-{Delta}v B-type NEA, (101955) 1999 RQ{sub 36}. A similar origin for (175706) 1996 FG{sub 3} would require delivery by the overlapping Jupiter 7:2 and Mars 5:9 mean motion resonances rather than the {nu}{sub 6}, and we find this to be a low probability, but possible, origin.},
doi = {10.1088/0004-637X/748/2/104},
url = {https://www.osti.gov/biblio/22016105}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 748,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2012},
month = {Sun Apr 01 00:00:00 EDT 2012}
}