Techniques d'observation spectroscopique d'astéroïdes

130 CHAPTER 7. SPECTRAL PROPERTIES OF MAIN BELT ASTEROIDS
The band minima for the (10484) Hecht are at 0.9244±0.0038 µm, respectively 2.0461±
0.1522 µm, resulting in a band separation of 1.1217µm. These values indicate an iron content
larger than 65 wt%, based on empirical relation obtained from the laboratory experiments. For
a similar analysis of the spectrum of (31569) 1999 FL18 the following values can be found
0.9310±0.0011 µm, respectively 2.0341±0.0094 µm for the band minima, and a band separation
of 1.1031 µm. These values are also equivalent with an iron content larger than 65
wt%.
(31569) 1999 FL18 belong to two different pairs which could be genetically related. The
extrapolation of the results to these pairs shows four new objects possible V-type inside the
asteroidal population.
The spectral observations and analysis of asteroid pairs is a new scientific program based on
the dynamical findings by Vokrouhlický & Nesvorný [2008].
tel-00785991, version 1 - 7 Feb 2013