Combining 3D Lightcurve Modeling and Spitzer Infrared Observations: 1313 Berna

Details Combining 3D Lightcurve Modeling and Spitzer Infrared Observations: 1313 Berna Combining 3D Lightcurve Modeling and Spitzer Infrared Observations: 1313 Berna

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.2815i&link_type=abstract

American Astronomical Society, DPS meeting #40, #28.15; Bulletin of the American Astronomical Society, Vol. 40, p.439

Astronomy and Astrophysics

Astronomy

Scientific paper

Mid-infrared spectroscopic observations from the Spitzer Space Telescope coupled with ground-based photometric observations help characterizing the dynamic and interior composition of binary asteroids. Key physical parameters such as, bulk density, porosity and angular momentum can be constrained and shed light, in turn, on their internal structure and formation mechanisms.
We have developed an analysis method for 1313 Berna, a synchronous binary with a rotational period of 25.46h (Behrend et al., 2006) and, as derived from Spitzer observations, an albedo of 0.194 and an effective diameter of 13.2 km, inferring a bulk density of 1.74 g/cm3. Our 3D inversion model of two Roche ellipsoids (Chandrasekhar, 1969) consists of an iterative algorithm, similar to Descamps et al. (Icarus, 2007), that fits synthetic lightcurves to the available observations (2004 to 2007 oppositions). The fitting is achieved by varying the rotational rate, size ratio, Minnaert's law coefficient and pole angle.
We will present the results of this simulation for 1313 Berna, namely, a refined pole solution, size and bulk density, as well as its origins implications. This algorithm could be applied to a large number of similarly sized binary asteroids. This research work was supported by the Spanish program INTEGRANTS and by NASA PAST NNX07AP70G.

Affiliated with

Also associated with

No associations

Rating

Combining 3D Lightcurve Modeling and Spitzer Infrared Observations: 1313 Berna 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 Combining 3D Lightcurve Modeling and Spitzer Infrared Observations: 1313 Berna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combining 3D Lightcurve Modeling and Spitzer Infrared Observations: 1313 Berna will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1437992