Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.418.1246w&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 418, Issue 2, pp. 1246-1257.
Astronomy and Astrophysics
Astronomy
2
Radiation Mechanisms: Thermal, Minor Planets, Asteroids: Individual: (175706)1996Fg3, Infrared: General
Scientific paper
Asteroid (175706) 1996 FG3 is a binary asteroid and the baseline target for the proposed MarcoPolo-R sample return mission. We present thermal-infrared photometry obtained with the European Southern Observatory (ESO) Very Large Telescope using the VISIR instrument, together with optical photometry obtained with the ESO New Technology Telescope using the EFOSC2 instrument. An absolute visual magnitude HV= 17.833 ± 0.024 and phase parameter G=-0.041 ± 0.005 are derived. The near-Earth asteroid thermal model has been fitted to the measured fluxes to derive a geometric visual albedo pv= 0.046 ± 0.014, effective diameter at the observed aspect Deff= 1.68 ± 0.25 km and beaming parameter η= 1.15 for phase angle α= 11?7. The advanced thermophysical model (ATPM) has been fitted to the measured fluxes to derive a more accurate effective diameter Deff= 1.71 ± 0.07 km and albedo pv= 0.044 ± 0.004. Based on the ATPM results, assuming the same albedo for primary and secondary, we derive a primary mean spherical diameter Dp= 1.69+0.18- 0.12 km, secondary diameter Ds= 0.51 ± 0.03 km and a secondary orbital semimajor axis a= 2.8+1.7-0.7 km. A low surface thermal inertia Γ= 120 ± 50 J m-2 s-1/2 K-1 was also derived, suggesting a dusty surface and raising questions as to the binary formation mechanism of this asteroid. These physical properties are used to predict a Yarkovsky drift in semimajor axis of -60+31-45 m yr-1. Based on observations performed at the ESO La Silla and Paranal Observatories in Chile (programme IDs 185.C-1033, 185.C-1034 and 184.C-1143).
Duddy Samuel R.
Green Simon F.
Hainaut Olivier R.
Lowry Stephen C.
Rozitis Ben
No associations
LandOfFree
Physical characterization of low delta-V asteroid (175706) 1996 FG3 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Physical characterization of low delta-V asteroid (175706) 1996 FG3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Physical characterization of low delta-V asteroid (175706) 1996 FG3 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1427416